Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:42 +0000 (14:31 -0800)]
sparc: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:41 +0000 (14:31 -0800)]
sh: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:40 +0000 (14:31 -0800)]
score: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Chen Liqin <liqin.chen@sunplusct.com>
Acked-by: Lennox Wu <lennox.wu@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:39 +0000 (14:31 -0800)]
s390: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:38 +0000 (14:31 -0800)]
powerpc: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:37 +0000 (14:31 -0800)]
parisc: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:36 +0000 (14:31 -0800)]
mips: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:35 +0000 (14:31 -0800)]
metag: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:34 +0000 (14:31 -0800)]
m68k: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:33 +0000 (14:31 -0800)]
m32r: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:32 +0000 (14:31 -0800)]
ia64: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:31 +0000 (14:31 -0800)]
hexagon: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Richard Kuo <rkuo@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:30 +0000 (14:31 -0800)]
frv: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:29 +0000 (14:31 -0800)]
cris: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Mikael Starvik <starvik@axis.com>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:28 +0000 (14:31 -0800)]
avr32: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:27 +0000 (14:31 -0800)]
arm64: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:26 +0000 (14:31 -0800)]
arm: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:25 +0000 (14:31 -0800)]
arc: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com> [for arch/arc bits]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:24 +0000 (14:31 -0800)]
alpha: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:23 +0000 (14:31 -0800)]
openrisc: add missing pgtable_page_ctor/dtor calls
It will fix NR_PAGETABLE accounting. It's also required if the arch is
going ever support split ptl.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Jonas Bonn <jonas@southpole.se>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:22 +0000 (14:31 -0800)]
mn10300: add missing pgtable_page_ctor/dtor calls
It will fix NR_PAGETABLE accounting. It's also required if the arch is
going ever support split ptl.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: David Howells <dhowells@redhat.com>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:21 +0000 (14:31 -0800)]
microblaze: add missing pgtable_page_ctor/dtor calls
It will fix NR_PAGETABLE accounting. It's also required if the arch is
going ever support split ptl.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Michal Simek <monstr@monstr.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:20 +0000 (14:31 -0800)]
mm: allow pgtable_page_ctor() to fail
Change pgtable_page_ctor() return type from void to bool. Returns true,
if initialization is successful and false otherwise.
Current implementation never fails, but it will change later.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:19 +0000 (14:31 -0800)]
xtensa: fix potential NULL-pointer dereference
Add missing check for memory allocation fail.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:18 +0000 (14:31 -0800)]
m32r: fix potential NULL-pointer dereference
Add missing check for memory allocation fail.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:17 +0000 (14:31 -0800)]
cris: fix potential NULL-pointer dereference
Add missing check for memory allocation fail.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Mikael Starvik <starvik@axis.com>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:13 +0000 (14:31 -0800)]
x86: add missed pgtable_pmd_page_ctor/dtor calls for preallocated pmds
In split page table lock case, we embed spinlock_t into struct page.
For obvious reason, we don't want to increase size of struct page if
spinlock_t is too big, like with DEBUG_SPINLOCK or DEBUG_LOCK_ALLOC or
on -rt kernel. So we disable split page table lock, if spinlock_t is
too big.
This patchset allows to allocate the lock dynamically if spinlock_t is
big. In this page->ptl is used to store pointer to spinlock instead of
spinlock itself. It costs additional cache line for indirect access,
but fix page fault scalability for multi-threaded applications.
LOCK_STAT depends on DEBUG_SPINLOCK, so on current kernel enabling
LOCK_STAT to analyse scalability issues breaks scalability. ;)
The patchset mostly fixes this. Results for ./thp_memscale -c 80 -b 512M
on 4-socket machine:
baseline, no CONFIG_LOCK_STAT: 9.
115460703 seconds time elapsed
baseline, CONFIG_LOCK_STAT=y: 53.
890567123 seconds time elapsed
patched, no CONFIG_LOCK_STAT: 8.
852250368 seconds time elapsed
patched, CONFIG_LOCK_STAT=y: 11.
069770759 seconds time elapsed
Patch count is scary, but most of them trivial. Overview:
Patches 1-4 Few bug fixes. No dependencies to other patches.
Probably should applied as soon as possible.
Patch 5 Changes signature of pgtable_page_ctor(). We will use it
for dynamic lock allocation, so it can fail.
Patches 6-8 Add missing constructor/destructor calls on few archs.
It's fixes NR_PAGETABLE accounting and prepare to use
split ptl.
Patches 9-33 Add pgtable_page_ctor() fail handling to all archs.
Patches 34 Finally adds support of dynamically-allocated page->pte.
Also contains documentation for split page table lock.
This patch (of 34):
I've missed that we preallocate few pmds on pgd_alloc() if X86_PAE
enabled. Let's add missed constructor/destructor calls.
I haven't noticed it during testing since prep_new_page() clears
page->mapping and therefore page->ptl. It's effectively equal to
spin_lock_init(&page->ptl).
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chen Liqin <liqin.chen@sunplusct.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Howells <dhowells@redhat.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:10 +0000 (14:31 -0800)]
x86, mm: enable split page table lock for PMD level
Enable PMD split page table lock for X86_64 and PAE.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:07 +0000 (14:31 -0800)]
mm: implement split page table lock for PMD level
The basic idea is the same as with PTE level: the lock is embedded into
struct page of table's page.
We can't use mm->pmd_huge_pte to store pgtables for THP, since we don't
take mm->page_table_lock anymore. Let's reuse page->lru of table's page
for that.
pgtable_pmd_page_ctor() returns true, if initialization is successful
and false otherwise. Current implementation never fails, but assumption
that constructor can fail will help to port it to -rt where spinlock_t
is rather huge and cannot be embedded into struct page -- dynamic
allocation is required.
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:04 +0000 (14:31 -0800)]
mm: convert the rest to new page table lock api
Only trivial cases left. Let's convert them altogether.
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:31:02 +0000 (14:31 -0800)]
mm, hugetlb: convert hugetlbfs to use split pmd lock
Hugetlb supports multiple page sizes. We use split lock only for PMD
level, but not for PUD.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:30:59 +0000 (14:30 -0800)]
mm, thp: do not access mm->pmd_huge_pte directly
Currently mm->pmd_huge_pte protected by page table lock. It will not
work with split lock. We have to have per-pmd pmd_huge_pte for proper
access serialization.
For now, let's just introduce wrapper to access mm->pmd_huge_pte.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:30:56 +0000 (14:30 -0800)]
mm, thp: move ptl taking inside page_check_address_pmd()
With split page table lock we can't know which lock we need to take
before we find the relevant pmd.
Let's move lock taking inside the function.
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:30:54 +0000 (14:30 -0800)]
mm, thp: change pmd_trans_huge_lock() to return taken lock
With split ptlock it's important to know which lock
pmd_trans_huge_lock() took. This patch adds one more parameter to the
function to return the lock.
In most places migration to new api is trivial. Exception is
move_huge_pmd(): we need to take two locks if pmd tables are different.
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:30:51 +0000 (14:30 -0800)]
mm: introduce api for split page table lock for PMD level
Basic api, backed by mm->page_table_lock for now. Actual implementation
will be added later.
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:30:48 +0000 (14:30 -0800)]
mm: convert mm->nr_ptes to atomic_long_t
With split page table lock for PMD level we can't hold mm->page_table_lock
while updating nr_ptes.
Let's convert it to atomic_long_t to avoid races.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:30:45 +0000 (14:30 -0800)]
mm: rename USE_SPLIT_PTLOCKS to USE_SPLIT_PTE_PTLOCKS
We're going to introduce split page table lock for PMD level. Let's
rename existing split ptlock for PTE level to avoid confusion.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:30:42 +0000 (14:30 -0800)]
mm: avoid increase sizeof(struct page) due to split page table lock
Alex Thorlton noticed that some massively threaded workloads work poorly,
if THP enabled. This patchset fixes this by introducing split page table
lock for PMD tables. hugetlbfs is not covered yet.
This patchset is based on work by Naoya Horiguchi.
: akpm result summary:
:
: THP off, v3.12-rc2: 18.
059261877 seconds time elapsed
: THP off, patched: 16.
768027318 seconds time elapsed
:
: THP on, v3.12-rc2: 42.
162306788 seconds time elapsed
: THP on, patched: 8.
397885779 seconds time elapsed
:
: HUGETLB, v3.12-rc2: 47.
574936948 seconds time elapsed
: HUGETLB, patched: 19.
447481153 seconds time elapsed
THP off, v3.12-rc2:
-------------------
Performance counter stats for './thp_memscale -c 80 -b 512m' (5 runs):
1037072.835207 task-clock # 57.426 CPUs utilized ( +- 3.59% )
95,093 context-switches # 0.092 K/sec ( +- 3.93% )
140 cpu-migrations # 0.000 K/sec ( +- 5.28% )
10,000,550 page-faults # 0.010 M/sec ( +- 0.00% )
2,455,210,400,261 cycles # 2.367 GHz ( +- 3.62% ) [83.33%]
2,429,281,882,056 stalled-cycles-frontend # 98.94% frontend cycles idle ( +- 3.67% ) [83.33%]
1,975,960,019,659 stalled-cycles-backend # 80.48% backend cycles idle ( +- 3.88% ) [66.68%]
46,503,296,013 instructions # 0.02 insns per cycle
# 52.24 stalled cycles per insn ( +- 3.21% ) [83.34%]
9,278,997,542 branches # 8.947 M/sec ( +- 4.00% ) [83.34%]
89,881,640 branch-misses # 0.97% of all branches ( +- 1.17% ) [83.33%]
18.
059261877 seconds time elapsed ( +- 2.65% )
THP on, v3.12-rc2:
------------------
Performance counter stats for './thp_memscale -c 80 -b 512m' (5 runs):
3114745.395974 task-clock # 73.875 CPUs utilized ( +- 1.84% )
267,356 context-switches # 0.086 K/sec ( +- 1.84% )
99 cpu-migrations # 0.000 K/sec ( +- 1.40% )
58,313 page-faults # 0.019 K/sec ( +- 0.28% )
7,416,635,817,510 cycles # 2.381 GHz ( +- 1.83% ) [83.33%]
7,342,619,196,993 stalled-cycles-frontend # 99.00% frontend cycles idle ( +- 1.88% ) [83.33%]
6,267,671,641,967 stalled-cycles-backend # 84.51% backend cycles idle ( +- 2.03% ) [66.67%]
117,819,935,165 instructions # 0.02 insns per cycle
# 62.32 stalled cycles per insn ( +- 4.39% ) [83.34%]
28,899,314,777 branches # 9.278 M/sec ( +- 4.48% ) [83.34%]
71,787,032 branch-misses # 0.25% of all branches ( +- 1.03% ) [83.33%]
42.
162306788 seconds time elapsed ( +- 1.73% )
HUGETLB, v3.12-rc2:
-------------------
Performance counter stats for './thp_memscale_hugetlbfs -c 80 -b 512M' (5 runs):
2588052.787264 task-clock # 54.400 CPUs utilized ( +- 3.69% )
246,831 context-switches # 0.095 K/sec ( +- 4.15% )
138 cpu-migrations # 0.000 K/sec ( +- 5.30% )
21,027 page-faults # 0.008 K/sec ( +- 0.01% )
6,166,666,307,263 cycles # 2.383 GHz ( +- 3.68% ) [83.33%]
6,086,008,929,407 stalled-cycles-frontend # 98.69% frontend cycles idle ( +- 3.77% ) [83.33%]
5,087,874,435,481 stalled-cycles-backend # 82.51% backend cycles idle ( +- 4.41% ) [66.67%]
133,782,831,249 instructions # 0.02 insns per cycle
# 45.49 stalled cycles per insn ( +- 4.30% ) [83.34%]
34,026,870,541 branches # 13.148 M/sec ( +- 4.24% ) [83.34%]
68,670,942 branch-misses # 0.20% of all branches ( +- 3.26% ) [83.33%]
47.
574936948 seconds time elapsed ( +- 2.09% )
THP off, patched:
-----------------
Performance counter stats for './thp_memscale -c 80 -b 512m' (5 runs):
943301.957892 task-clock # 56.256 CPUs utilized ( +- 3.01% )
86,218 context-switches # 0.091 K/sec ( +- 3.17% )
121 cpu-migrations # 0.000 K/sec ( +- 6.64% )
10,000,551 page-faults # 0.011 M/sec ( +- 0.00% )
2,230,462,457,654 cycles # 2.365 GHz ( +- 3.04% ) [83.32%]
2,204,616,385,805 stalled-cycles-frontend # 98.84% frontend cycles idle ( +- 3.09% ) [83.32%]
1,778,640,046,926 stalled-cycles-backend # 79.74% backend cycles idle ( +- 3.47% ) [66.69%]
45,995,472,617 instructions # 0.02 insns per cycle
# 47.93 stalled cycles per insn ( +- 2.51% ) [83.34%]
9,179,700,174 branches # 9.731 M/sec ( +- 3.04% ) [83.35%]
89,166,529 branch-misses # 0.97% of all branches ( +- 1.45% ) [83.33%]
16.
768027318 seconds time elapsed ( +- 2.47% )
THP on, patched:
----------------
Performance counter stats for './thp_memscale -c 80 -b 512m' (5 runs):
458793.837905 task-clock # 54.632 CPUs utilized ( +- 0.79% )
41,831 context-switches # 0.091 K/sec ( +- 0.97% )
98 cpu-migrations # 0.000 K/sec ( +- 1.66% )
57,829 page-faults # 0.126 K/sec ( +- 0.62% )
1,077,543,336,716 cycles # 2.349 GHz ( +- 0.81% ) [83.33%]
1,067,403,802,964 stalled-cycles-frontend # 99.06% frontend cycles idle ( +- 0.87% ) [83.33%]
864,764,616,143 stalled-cycles-backend # 80.25% backend cycles idle ( +- 0.73% ) [66.68%]
16,129,177,440 instructions # 0.01 insns per cycle
# 66.18 stalled cycles per insn ( +- 7.94% ) [83.35%]
3,618,938,569 branches # 7.888 M/sec ( +- 8.46% ) [83.36%]
33,242,032 branch-misses # 0.92% of all branches ( +- 2.02% ) [83.32%]
8.
397885779 seconds time elapsed ( +- 0.18% )
HUGETLB, patched:
-----------------
Performance counter stats for './thp_memscale_hugetlbfs -c 80 -b 512M' (5 runs):
395353.076837 task-clock # 20.329 CPUs utilized ( +- 8.16% )
55,730 context-switches # 0.141 K/sec ( +- 5.31% )
138 cpu-migrations # 0.000 K/sec ( +- 4.24% )
21,027 page-faults # 0.053 K/sec ( +- 0.00% )
930,219,717,244 cycles # 2.353 GHz ( +- 8.21% ) [83.32%]
914,295,694,103 stalled-cycles-frontend # 98.29% frontend cycles idle ( +- 8.35% ) [83.33%]
704,137,950,187 stalled-cycles-backend # 75.70% backend cycles idle ( +- 9.16% ) [66.69%]
30,541,538,385 instructions # 0.03 insns per cycle
# 29.94 stalled cycles per insn ( +- 3.98% ) [83.35%]
8,415,376,631 branches # 21.286 M/sec ( +- 3.61% ) [83.36%]
32,645,478 branch-misses # 0.39% of all branches ( +- 3.41% ) [83.32%]
19.
447481153 seconds time elapsed ( +- 2.00% )
This patch (of 11):
CONFIG_GENERIC_LOCKBREAK increases sizeof(spinlock_t) to 8 bytes. It
leads to increase sizeof(struct page) by 4 bytes on 32-bit system if split
page table lock is in use, since page->ptl shares space in union with
longs and pointers.
Let's disable split page table lock on 32-bit systems with
GENERIC_LOCKBREAK enabled.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kirill A. Shutemov [Thu, 14 Nov 2013 22:30:40 +0000 (14:30 -0800)]
mm: drop actor argument of do_generic_file_read()
There's only one caller of do_generic_file_read() and the only actor is
file_read_actor(). No reason to have a callback parameter.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Matthew Wilcox <willy@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andrew Morton [Thu, 14 Nov 2013 22:30:39 +0000 (14:30 -0800)]
drivers/memstick/core/ms_block.c: fix spelling of MSB_RP_RECIVE_STATUS_REG
Cc: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Thu, 14 Nov 2013 08:19:58 +0000 (17:19 +0900)]
Merge tag 'ext4_for_linus' of git://git./linux/kernel/git/tytso/ext4
Pull ext4 changes from Ted Ts'o:
"Ext4 updates for 3.13. Mostly bug fixes and cleanups"
* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: add prototypes for macro-generated functions
ext4: return non-zero st_blocks for inline data
ext4: use prandom_u32() instead of get_random_bytes()
ext4: remove unreachable code after ext4_can_extents_be_merged()
ext4: remove unreachable code in ext4_can_extents_be_merged()
ext4: avoid bh leak in retry path of ext4_expand_extra_isize_ea()
ext4: don't count free clusters from a corrupt block group
ext4: fix FITRIM in no journal mode
ext4: drop set but otherwise unused variable from ext4_add_dirent_to_inline()
ext4: change ext4_read_inline_dir() to return 0 on success
ext4: pair trace_ext4_writepages & trace_ext4_writepages_result
ext4: add ratelimiting to ext4 messages
ext4: fix performance regression in ext4_writepages
ext4: fixup kerndoc annotation of mpage_map_and_submit_extent()
ext4: fix assertion in ext4_add_complete_io()
Linus Torvalds [Thu, 14 Nov 2013 08:16:35 +0000 (17:16 +0900)]
Merge tag 'xfs-for-linus-v3.13-rc1' of git://oss.sgi.com/xfs/xfs
Pull xfs update from Ben Myers:
"For 3.13-rc1 we have an eclectic assortment of bugfixes, cleanups, and
refactoring. Bugfixes that stand out are the fix for the AGF/AGI
deadlock, incore extent list fixes, verifier fixes for v4 superblocks
and growfs, and memory leaks. There are some asserts, warnings, and
strings that were cleaned up. There was further rearrangement of code
to make libxfs and the kernel sync up more easily, differences between
v2 and v3 directory code were abstracted using an ops vector,
xfs_inactive was reworked, and the preallocation/hole punching code
was refactored.
- simplify kmem_zone_zalloc
- add traces for AGF/AGI read ops
- add additional AIL traces
- fix xfs_remove AGF vs AGI deadlock
- fix the extent count of new incore extent page in the indirection
array
- don't fail bad secondary superblocks verification on v4 filesystems
due to unzeroed bits after v4 fields
- fix possible NULL dereference in xlog_verify_iclog
- remove redundant assert in xfs_dir2_leafn_split
- prevent stack overflows from page cache allocation
- fix some sparse warnings
- fix directory block format verifier to check the leaf entry count
- abstract the differences in dir2/dir3 via an ops vector
- continue process of reorganization to make libxfs/kernel code
merges easier
- refactor the preallocation and hole punching code
- fix for growfs and verifiers
- remove unnecessary scary corruption error when probing non-xfs
filesystems
- remove extra newlines from strings passed to printk
- prevent deadlock trying to cover an active log
- rework xfs_inactive()
- add the inode directory type support to XFS_IOC_FSGEOM
- cleanup (remove) usage of is_bad_inode
- fix miscalculation in xfs_iext_realloc_direct which results in
oversized direct extent list
- remove unnecessary count arg to xfs_iomap_write_allocate
- fix memory leak in xlog_recover_add_to_trans
- check superblock instead of block magic to determine if dtype field
is present
- fix lockdep annotation due to project quotas
- fix regression in xfs_node_toosmall which can lead to incorrect
directory btree node collapse
- make log recovery verify filesystem uuid of recovering blocks
- fix XFS_IOC_FREE_EOFBLOCKS definition
- remove invalid assert in xfs_inode_free
- fix for AIL lock regression"
* tag 'xfs-for-linus-v3.13-rc1' of git://oss.sgi.com/xfs/xfs: (49 commits)
xfs: simplify kmem_{zone_}zalloc
xfs: add tracepoints to AGF/AGI read operations
xfs: trace AIL manipulations
xfs: xfs_remove deadlocks due to inverted AGF vs AGI lock ordering
xfs: fix the extent count when allocating an new indirection array entry
xfs: be more forgiving of a v4 secondary sb w/ junk in v5 fields
xfs: fix possible NULL dereference in xlog_verify_iclog
xfs:xfs_dir2_node.c: pointer use before check for null
xfs: prevent stack overflows from page cache allocation
xfs: fix static and extern sparse warnings
xfs: validity check the directory block leaf entry count
xfs: make dir2 ftype offset pointers explicit
xfs: convert directory vector functions to constants
xfs: convert directory vector functions to constants
xfs: vectorise encoding/decoding directory headers
xfs: vectorise DA btree operations
xfs: vectorise directory leaf operations
xfs: vectorise directory data operations part 2
xfs: vectorise directory data operations
xfs: vectorise remaining shortform dir2 ops
...
Linus Torvalds [Thu, 14 Nov 2013 07:56:32 +0000 (16:56 +0900)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull perf updates from Ingo Molnar:
"A number of fixes:
- Fix segfault on perf trace -i perf.data, from Namhyung Kim.
- Fix segfault with --no-mmap-pages, from David Ahern.
- Don't force a refresh during progress update in the TUI, greatly
reducing startup costs, fix from Patrick Palka.
- Fix sw clock event period test wrt not checking if using >
max_sample_freq.
- Handle throttle events in 'object code reading' test, fix from
Adrian Hunter.
- Prevent condition that all sort keys are elided, fix from Namhyung
Kim.
- Round mmap pages to power 2, from David Ahern.
And a number of late arrival changes:
- Add summary only option to 'perf trace', suppressing the decoding
of events, from David Ahern
- 'perf trace --summary' formatting simplifications, from Pekka
Enberg.
- Beautify fifth argument of mmap() as fd, in 'perf trace', from
Namhyung Kim.
- Add direct access to dynamic arrays in libtraceevent, from Steven
Rostedt.
- Synthesize non-exec MMAP records when --data used, allowing the
resolution of data addresses to symbols (global variables, etc), by
Arnaldo Carvalho de Melo.
- Code cleanups by David Ahern and Adrian Hunter"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
tools lib traceevent: Add direct access to dynamic arrays
perf target: Shorten perf_target__ to target__
perf tests: Handle throttle events in 'object code reading' test
perf evlist: Refactor mmap_pages parsing
perf evlist: Round mmap pages to power 2 - v2
perf record: Fix segfault with --no-mmap-pages
perf trace: Add summary only option
perf trace: Simplify '--summary' output
perf trace: Change syscall summary duration order
perf tests: Compensate lower sample freq with longer test loop
perf trace: Fix segfault on perf trace -i perf.data
perf trace: Separate tp syscall field caching into init routine to be reused
perf trace: Beautify fifth argument of mmap() as fd
perf tests: Use lower sample_freq in sw clock event period test
perf tests: Check return of perf_evlist__open sw clock event period test
perf record: Move existing write_output into helper function
perf record: Use correct return type for write()
perf tools: Prevent condition that all sort keys are elided
perf machine: Simplify synthesize_threads method
perf machine: Introduce synthesize_threads method out of open coded equivalent
...
Linus Torvalds [Thu, 14 Nov 2013 07:55:56 +0000 (16:55 +0900)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull two x86 fixes from Ingo Molnar.
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/microcode/amd: Tone down printk(), don't treat a missing firmware file as an error
x86/dumpstack: Fix printk_address for direct addresses
Linus Torvalds [Thu, 14 Nov 2013 07:55:11 +0000 (16:55 +0900)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:
"Four bugfixes and one performance fix"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/fair: Avoid integer overflow
sched: Optimize task_sched_runtime()
sched/numa: Cure update_numa_stats() vs. hotplug
sched/numa: Fix NULL pointer dereference in task_numa_migrate()
sched: Fix endless sync_sched/rcu() loop inside _cpu_down()
Linus Torvalds [Thu, 14 Nov 2013 07:30:30 +0000 (16:30 +0900)]
Merge branch 'core-locking-for-linus' of git://git./linux/kernel/git/tip/tip
Pull core locking changes from Ingo Molnar:
"The biggest changes:
- add lockdep support for seqcount/seqlocks structures, this
unearthed both bugs and required extra annotation.
- move the various kernel locking primitives to the new
kernel/locking/ directory"
* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
block: Use u64_stats_init() to initialize seqcounts
locking/lockdep: Mark __lockdep_count_forward_deps() as static
lockdep/proc: Fix lock-time avg computation
locking/doc: Update references to kernel/mutex.c
ipv6: Fix possible ipv6 seqlock deadlock
cpuset: Fix potential deadlock w/ set_mems_allowed
seqcount: Add lockdep functionality to seqcount/seqlock structures
net: Explicitly initialize u64_stats_sync structures for lockdep
locking: Move the percpu-rwsem code to kernel/locking/
locking: Move the lglocks code to kernel/locking/
locking: Move the rwsem code to kernel/locking/
locking: Move the rtmutex code to kernel/locking/
locking: Move the semaphore core to kernel/locking/
locking: Move the spinlock code to kernel/locking/
locking: Move the lockdep code to kernel/locking/
locking: Move the mutex code to kernel/locking/
hung_task debugging: Add tracepoint to report the hang
x86/locking/kconfig: Update paravirt spinlock Kconfig description
lockstat: Report avg wait and hold times
lockdep, x86/alternatives: Drop ancient lockdep fixup message
...
Linus Torvalds [Thu, 14 Nov 2013 07:25:10 +0000 (16:25 +0900)]
Merge branch 'x86-trace-for-linus' of git://git./linux/kernel/git/tip/tip
Pull x86/trace changes from Ingo Molnar:
"This adds page fault tracepoints which have zero runtime cost in the
disabled case via IDT trickery (no NOPs in the page fault hotpath)"
* 'x86-trace-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, trace: Change user|kernel_page_fault to page_fault_user|kernel
x86, trace: Add page fault tracepoints
x86, trace: Delete __trace_alloc_intr_gate()
x86, trace: Register exception handler to trace IDT
x86, trace: Remove __alloc_intr_gate()
Linus Torvalds [Thu, 14 Nov 2013 05:44:20 +0000 (14:44 +0900)]
Merge tag 'fbdev-3.13' of git://git./linux/kernel/git/tomba/linux
Pull fbdev changes from Tomi Valkeinen:
"Nothing particularly stands out in this pull request. The biggest
part of the changes are cleanups.
Maybe one fix to mention is the "fb: reorder the lock sequence to fix
potential dead lock" which hopefully fixes the fb locking issues
reported by multiple persons.
There are also a few commits that have changes to arch/arm/mach-at91
and arch/avr32, which have been acked by the maintainers"
* tag 'fbdev-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux: (143 commits)
fb: reorder the lock sequence to fix potential dead lock
fbdev: shmobile-lcdcfb: Convert to clk_prepare/unprepare
fbdev: shmobile-hdmi: Convert to clk_prepare/unprepare
omapdss: Add new panel driver for Topolly td028ttec1 LCD.
video: exynos_mipi_dsi: Unlock the mutex before returning
video: da8xx-fb: remove unwanted define
video: Remove unnecessary semicolons
simplefb: use write-combined remapping
simplefb: fix unmapping fb during destruction
OMAPDSS: connector-dvi: fix releasing i2c_adapter
OMAPDSS: DSI: fix perf measuring ifdefs
framebuffer: Use fb_<level>
framebuffer: Add fb_<level> convenience logging macros
efifb: prevent null-deref when iterating dmi_list
fbdev: fix error return code in metronomefb_probe()
video: xilinxfb: Fix for "Use standard variable name convention"
OMAPDSS: Fix de_level in videomode_to_omap_video_timings()
video: xilinxfb: Simplify error path
video: xilinxfb: Use devm_kzalloc instead of kzalloc
video: xilinxfb: Use standard variable name convention
...
Linus Torvalds [Thu, 14 Nov 2013 05:42:31 +0000 (14:42 +0900)]
Merge branch 'next' of git://git./linux/kernel/git/rzhang/linux
Pull thermal management updates from Zhang Rui:
"This time we only have a few changes as there are no soc thermal
changes from Eduardo. The only big change is the introduction of
TMON, a tool to help visualize, tune, and test the thermal subsystem.
The rest is mostly cleanups and fixes all over.
Specifics:
- introduce TMON, a tool base on thermal sysfs I/F. It can be used
to visualize, tune and test the thermal subsystem.
- fix a zone/cooling device binding problem, when both thermal zone
bind parameters and .bind() callback are available"
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
tools/thermal: Introduce tmon, a tool for thermal subsystem
thermal: Fix binding problem when there is thermal zone params
thermal: cpu_cooling: fix return value check in cpufreq_cooling_register()
Thermal: Check for validity before doing kfree
thermal/intel_powerclamp: Add newer CPU models
Thermal: Tidy up error handling in powerclamp_init
thermal: Kconfig: cosmetic fixes
ACPI/thermal : Remove zone disabled warning
typo in drivers/thermal/Kconfig: lpatform instead of platform
Linus Torvalds [Thu, 14 Nov 2013 05:02:00 +0000 (14:02 +0900)]
Merge tag 'pci-v3.13-changes' of git://git./linux/kernel/git/helgaas/pci
Pull PCI changes from Bjorn Helgaas:
"Resource management
- Fix host bridge window coalescing (Alexey Neyman)
- Pass type, width, and prefetchability for window alignment (Wei Yang)
PCI device hotplug
- Convert acpiphp, acpiphp_ibm to dynamic debug (Lan Tianyu)
Power management
- Remove pci_pm_complete() (Liu Chuansheng)
MSI
- Fail initialization if device is not in PCI_D0 (Yijing Wang)
MPS (Max Payload Size)
- Use pcie_get_mps() and pcie_set_mps() to simplify code (Yijing Wang)
- Use pcie_set_readrq() to simplify code (Yijing Wang)
- Use cached pci_dev->pcie_mpss to simplify code (Yijing Wang)
SR-IOV
- Enable upstream bridges even for VFs on virtual buses (Bjorn Helgaas)
- Use pci_is_root_bus() to avoid catching virtual buses (Wei Yang)
Virtualization
- Add x86 MSI masking ops (Konrad Rzeszutek Wilk)
Freescale i.MX6
- Support i.MX6 PCIe controller (Sean Cross)
- Increase link startup timeout (Marek Vasut)
- Probe PCIe in fs_initcall() (Marek Vasut)
- Fix imprecise abort handler (Tim Harvey)
- Remove redundant of_match_ptr (Sachin Kamat)
Renesas R-Car
- Support Gen2 internal PCIe controller (Valentine Barshak)
Samsung Exynos
- Add MSI support (Jingoo Han)
- Turn off power when link fails (Jingoo Han)
- Add Jingoo Han as maintainer (Jingoo Han)
- Add clk_disable_unprepare() on error path (Wei Yongjun)
- Remove redundant of_match_ptr (Sachin Kamat)
Synopsys DesignWare
- Add irq_create_mapping() (Pratyush Anand)
- Add header guards (Seungwon Jeon)
Miscellaneous
- Enable native PCIe services by default on non-ACPI (Andrew Murray)
- Cleanup _OSC usage and messages (Bjorn Helgaas)
- Remove pcibios_last_bus boot option on non-x86 (Bjorn Helgaas)
- Convert bus code to use bus_, drv_, and dev_groups (Greg Kroah-Hartman)
- Remove unused pci_mem_start (Myron Stowe)
- Make sysfs functions static (Sachin Kamat)
- Warn on invalid return from driver probe (Stephen M. Cameron)
- Remove Intel Haswell D3 delays (Todd E Brandt)
- Call pci_set_master() in core if driver doesn't do it (Yinghai Lu)
- Use pci_is_pcie() to simplify code (Yijing Wang)
- Use PCIe capability accessors to simplify code (Yijing Wang)
- Use cached pci_dev->pcie_cap to simplify code (Yijing Wang)
- Removed unused "is_pcie" from struct pci_dev (Yijing Wang)
- Simplify sysfs CPU affinity implementation (Yijing Wang)"
* tag 'pci-v3.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (79 commits)
PCI: Enable upstream bridges even for VFs on virtual buses
PCI: Add pci_upstream_bridge()
PCI: Add x86_msi.msi_mask_irq() and msix_mask_irq()
PCI: Warn on driver probe return value greater than zero
PCI: Drop warning about drivers that don't use pci_set_master()
PCI: Workaround missing pci_set_master in pci drivers
powerpc/pci: Use pci_is_pcie() to simplify code [fix]
PCI: Update pcie_ports 'auto' behavior for non-ACPI platforms
PCI: imx6: Probe the PCIe in fs_initcall()
PCI: Add R-Car Gen2 internal PCI support
PCI: imx6: Remove redundant of_match_ptr
PCI: Report pci_pme_active() kmalloc failure
mn10300/PCI: Remove useless pcibios_last_bus
frv/PCI: Remove pcibios_last_bus
PCI: imx6: Increase link startup timeout
PCI: exynos: Remove redundant of_match_ptr
PCI: imx6: Fix imprecise abort handler
PCI: Fail MSI/MSI-X initialization if device is not in PCI_D0
PCI: imx6: Remove redundant dev_err() in imx6_pcie_probe()
x86/PCI: Coalesce multiple overlapping host bridge windows
...
Linus Torvalds [Thu, 14 Nov 2013 04:41:48 +0000 (13:41 +0900)]
Merge tag 'pm+acpi-3.13-rc1' of git://git./linux/kernel/git/rafael/linux-pm
Pull ACPI and power management updates from Rafael J Wysocki:
- New power capping framework and the the Intel Running Average Power
Limit (RAPL) driver using it from Srinivas Pandruvada and Jacob Pan.
- Addition of the in-kernel switching feature to the arm_big_little
cpufreq driver from Viresh Kumar and Nicolas Pitre.
- cpufreq support for iMac G5 from Aaro Koskinen.
- Baytrail processors support for intel_pstate from Dirk Brandewie.
- cpufreq support for Midway/ECX-2000 from Mark Langsdorf.
- ARM vexpress/TC2 cpufreq support from Sudeep KarkadaNagesha.
- ACPI power management support for the I2C and SPI bus types from Mika
Westerberg and Lv Zheng.
- cpufreq core fixes and cleanups from Viresh Kumar, Srivatsa S Bhat,
Stratos Karafotis, Xiaoguang Chen, Lan Tianyu.
- cpufreq drivers updates (mostly fixes and cleanups) from Viresh
Kumar, Aaro Koskinen, Jungseok Lee, Sudeep KarkadaNagesha, Lukasz
Majewski, Manish Badarkhe, Hans-Christian Egtvedt, Evgeny Kapaev.
- intel_pstate updates from Dirk Brandewie and Adrian Huang.
- ACPICA update to version
20130927 includig fixes and cleanups and
some reduction of divergences between the ACPICA code in the kernel
and ACPICA upstream in order to improve the automatic ACPICA patch
generation process. From Bob Moore, Lv Zheng, Tomasz Nowicki, Naresh
Bhat, Bjorn Helgaas, David E Box.
- ACPI IPMI driver fixes and cleanups from Lv Zheng.
- ACPI hotplug fixes and cleanups from Bjorn Helgaas, Toshi Kani, Zhang
Yanfei, Rafael J Wysocki.
- Conversion of the ACPI AC driver to the platform bus type and
multiple driver fixes and cleanups related to ACPI from Zhang Rui.
- ACPI processor driver fixes and cleanups from Hanjun Guo, Jiang Liu,
Bartlomiej Zolnierkiewicz, Mathieu Rhéaume, Rafael J Wysocki.
- Fixes and cleanups and new blacklist entries related to the ACPI
video support from Aaron Lu, Felipe Contreras, Lennart Poettering,
Kirill Tkhai.
- cpuidle core cleanups from Viresh Kumar and Lorenzo Pieralisi.
- cpuidle drivers fixes and cleanups from Daniel Lezcano, Jingoo Han,
Bartlomiej Zolnierkiewicz, Prarit Bhargava.
- devfreq updates from Sachin Kamat, Dan Carpenter, Manish Badarkhe.
- Operation Performance Points (OPP) core updates from Nishanth Menon.
- Runtime power management core fix from Rafael J Wysocki and update
from Ulf Hansson.
- Hibernation fixes from Aaron Lu and Rafael J Wysocki.
- Device suspend/resume lockup detection mechanism from Benoit Goby.
- Removal of unused proc directories created for various ACPI drivers
from Lan Tianyu.
- ACPI LPSS driver fix and new device IDs for the ACPI platform scan
handler from Heikki Krogerus and Jarkko Nikula.
- New ACPI _OSI blacklist entry for Toshiba NB100 from Levente Kurusa.
- Assorted fixes and cleanups related to ACPI from Andy Shevchenko, Al
Stone, Bartlomiej Zolnierkiewicz, Colin Ian King, Dan Carpenter,
Felipe Contreras, Jianguo Wu, Lan Tianyu, Yinghai Lu, Mathias Krause,
Liu Chuansheng.
- Assorted PM fixes and cleanups from Andy Shevchenko, Thierry Reding,
Jean-Christophe Plagniol-Villard.
* tag 'pm+acpi-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (386 commits)
cpufreq: conservative: fix requested_freq reduction issue
ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines
PM / runtime: Use pm_runtime_put_sync() in __device_release_driver()
ACPI / event: remove unneeded NULL pointer check
Revert "ACPI / video: Ignore BIOS initial backlight value for HP 250 G1"
ACPI / video: Quirk initial backlight level 0
ACPI / video: Fix initial level validity test
intel_pstate: skip the driver if ACPI has power mgmt option
PM / hibernate: Avoid overflow in hibernate_preallocate_memory()
ACPI / hotplug: Do not execute "insert in progress" _OST
ACPI / hotplug: Carry out PCI root eject directly
ACPI / hotplug: Merge device hot-removal routines
ACPI / hotplug: Make acpi_bus_hot_remove_device() internal
ACPI / hotplug: Simplify device ejection routines
ACPI / hotplug: Fix handle_root_bridge_removal()
ACPI / hotplug: Refuse to hot-remove all objects with disabled hotplug
ACPI / scan: Start matching drivers after trying scan handlers
ACPI: Remove acpi_pci_slot_init() headers from internal.h
ACPI / blacklist: fix name of ThinkPad Edge E530
PowerCap: Fix build error with option -Werror=format-security
...
Conflicts:
arch/arm/mach-omap2/opp.c
drivers/Kconfig
drivers/spi/spi.c
Linus Torvalds [Thu, 14 Nov 2013 03:35:48 +0000 (12:35 +0900)]
Merge tag 'dm-3.13-changes' of git://git./linux/kernel/git/device-mapper/linux-dm
Pull device mapper changes from Mike Snitzer:
"A set of device-mapper changes for 3.13.
Improve reliability of buffer allocations for dm messages with a small
number of arguments, a couple path group initialization fixes for dm
multipath, a fix for resizing a dm array, various fixes and
optimizations for dm cache, a fix for device mapper's Kconfig menu
indentation.
Features added include:
- dm crypt support for activating legacy CBC TrueCrypt containers
(useful for forensics of these old TCRYPT containers)
- reduced dm-cache memory requirements for each block in the cache
- basic support for shrinking a dm-cache's cache (fast) device
- most notably, dm-cache support for managing cache coherency when
deploying dm-cache with sophisticated origin volumes (that support
hardware snapshots and/or clustering): these changes come in the
form of a new passthrough operation mode and a cache block
invalidation interface"
* tag 'dm-3.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (32 commits)
dm cache: resolve small nits and improve Documentation
dm cache: add cache block invalidation support
dm cache: add remove_cblock method to policy interface
dm cache policy mq: reduce memory requirements
dm cache metadata: check the metadata version when reading the superblock
dm cache: add passthrough mode
dm cache: cache shrinking support
dm cache: promotion optimisation for writes
dm cache: be much more aggressive about promoting writes to discarded blocks
dm cache policy mq: implement writeback_work() and mq_{set,clear}_dirty()
dm cache: optimize commit_if_needed
dm space map disk: optimise sm_disk_dec_block
MAINTAINERS: add reference to device-mapper's linux-dm.git tree
dm: fix Kconfig menu indentation
dm: allow remove to be deferred
dm table: print error on preresume failure
dm crypt: add TCW IV mode for old CBC TCRYPT containers
dm crypt: properly handle extra key string in initialization
dm cache: log error message if dm_kcopyd_copy() fails
dm cache: use cell_defer() boolean argument consistently
...
Linus Torvalds [Thu, 14 Nov 2013 03:31:43 +0000 (12:31 +0900)]
Merge tag 'for-linus-
20131112' of git://git.infradead.org/linux-mtd
Pull MTD changes from Brian Norris:
- Unify some compile-time differences so that we have fewer uses of
#ifdef CONFIG_OF in atmel_nand
- Other general cleanups (removing unused functions, options,
variables, fields; use correct interfaces)
- Fix BUG() for new odd-sized NAND, which report non-power-of-2
dimensions via ONFI
- Miscellaneous driver fixes (SPI NOR flash; BCM47xx NAND flash; etc.)
- Improve differentiation between SLC and MLC NAND -- this clarifies an
ABI issue regarding the MTD "type" (in sysfs and in the MEMGETINFO
ioctl), where the MTD_MLCNANDFLASH type was present but
inconsistently used
- Extend GPMI NAND to support multi-chip-select NAND for some platforms
- Many improvements to the OMAP2/3 NAND driver, including an expanded
DT binding to bring us closer to mainline support for some OMAP
systems
- Fix a deadlock in the error path of the Atmel NAND driver probe
- Correct the error codes from MTD mmap() to conform to POSIX and the
Linux Programmer's Manual. This is an acknowledged change in the MTD
ABI, but I can't imagine somebody relying on the non-standard -ENOSYS
error code specifically. Am I just being unimaginative? :)
- Fix a few important GPMI NAND bugs (one regression from 3.12 and one
long-standing race condition)
- More? Read the log!
* tag 'for-linus-
20131112' of git://git.infradead.org/linux-mtd: (98 commits)
mtd: gpmi: fix the NULL pointer
mtd: gpmi: fix kernel BUG due to racing DMA operations
mtd: mtdchar: return expected errors on mmap() call
mtd: gpmi: only scan two chips for imx6
mtd: gpmi: Use devm_kzalloc()
mtd: atmel_nand: fix bug driver will in a dead lock if no nand detected
mtd: nand: use a local variable to simplify the nand_scan_tail
mtd: nand: remove deprecated IRQF_DISABLED
mtd: dataflash: Say if we find a device we don't support
mtd: nand: omap: fix error return code in omap_nand_probe()
mtd: nand_bbt: kill NAND_BBT_SCANALLPAGES
mtd: m25p80: fixup device removal failure path
mtd: mxc_nand: Include linux/of.h header
mtd: remove duplicated include from mtdcore.c
mtd: m25p80: add support for Macronix mx25l3255e
mtd: nand: omap: remove selection of BCH ecc-scheme via KConfig
mtd: nand: omap: updated devm_xx for all resource allocation and free calls
mtd: nand: omap: use drivers/mtd/nand/nand_bch.c wrapper for BCH ECC instead of lib/bch.c
mtd: nand: omap: clean-up ecc layout for BCH ecc schemes
mtd: nand: omap2: clean-up BCHx_HW and BCHx_SW ECC configurations in device_probe
...
Linus Torvalds [Thu, 14 Nov 2013 03:25:38 +0000 (12:25 +0900)]
Merge tag 'scsi-for-linus' of git://git./linux/kernel/git/jejb/scsi
Pull first round of SCSI updates from James Bottomley:
"This patch set is driver updates for qla4xxx, scsi_debug, pm80xx,
fcoe/libfc, eas2r, lpfc, be2iscsi and megaraid_sas plus some assorted
bug fixes and cleanups"
* tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (106 commits)
[SCSI] scsi_error: Escalate to LUN reset if abort fails
[SCSI] Add 'eh_deadline' to limit SCSI EH runtime
[SCSI] remove check for 'resetting'
[SCSI] dc395: Move 'last_reset' into internal host structure
[SCSI] tmscsim: Move 'last_reset' into host structure
[SCSI] advansys: Remove 'last_reset' references
[SCSI] dpt_i2o: return SCSI_MLQUEUE_HOST_BUSY when in reset
[SCSI] dpt_i2o: Remove DPTI_STATE_IOCTL
[SCSI] megaraid_sas: Fix synchronization problem between sysPD IO path and AEN path
[SCSI] lpfc: Fix typo on NULL assignment
[SCSI] scsi_dh_alua: ALUA handler attach should succeed while TPG is transitioning
[SCSI] scsi_dh_alua: ALUA check sense should retry device internal reset unit attention
[SCSI] esas2r: Cleanup snprinf formatting of firmware version
[SCSI] esas2r: Remove superfluous mask of pcie_cap_reg
[SCSI] esas2r: Fixes for big-endian platforms
[SCSI] esas2r: Directly call kernel functions for atomic bit operations
[SCSI] lpfc 8.3.43: Update lpfc version to driver version 8.3.43
[SCSI] lpfc 8.3.43: Fixed not processing task management IOCB response status
[SCSI] lpfc 8.3.43: Fixed spinlock hang.
[SCSI] lpfc 8.3.43: Fixed invalid Total_Data_Placed value received for els and ct command responses
...
Linus Torvalds [Thu, 14 Nov 2013 03:13:05 +0000 (12:13 +0900)]
Merge branch 'for-3.13/drivers' of git://git.kernel.dk/linux-block
Pull block driver updates from Jens Axboe:
"This is the block driver pull request for 3.13. As with the core pull
request just sent out, this was rebased on top of the core branch
again after the immutable series was pulled. This also means that
bcache gets to sit the initial pull over. I will send a second driver
pull request in the merge window to get those fixes in, once they have
been rebased and tested on top of the non-immutable stack.
This pull request contains:
- Add support for the sTec Kronos pci-e flash card from sTec. Also
has various cleanups for this driver, from myself, Bart, Mike
Snizter, and Wei Yongjun.
- Add surprise removal support for the micron mtip32xx driver from
Micron.
- Floppy documentation fix from Ben Harris.
- debugfs bug fix for pktcdvd from Dan Carpenter.
- Fix for the mtip32xx driver stack usage in the debugfs path,
dynamically allocating those buffers instead. From David Milburn.
- Disable cpqarray in Kconfig. The plan is to remove it on request
of HP, but lets disable it for a few revisions just to see if
anyone yells.
- drbd fixes from Lars Ellenberg and Philipp Reisner.
- Elevator switch fix for the s390 block driver from Heiko Carstens.
- loop crash fix on IO to unassigned device from Mikulas Patocka.
- A series of bug fixes for the IBM rsxx pci-e flash driver from
Philip J Kelleher.
- cciss probe fix from Stephen Cameron.
- Xen block front/back fixes from Roger Pau Monne and Vegard Nossum"
* 'for-3.13/drivers' of git://git.kernel.dk/linux-block: (41 commits)
floppy: Correct documentation of driver options when used as a module.
pktcdvd: debugfs functions return NULL on error
xen-blkfront: restore the non-persistent data path
skd: fix formatting in skd_s1120.h
skd: reorder construct/destruct code
skd: cleanup skd_do_inq_page_da()
skd: remove SKD_OMIT_FROM_SRC_DIST ifdefs
skd: remove redundant skdev->pdev assignment from skd_pci_probe()
skd: use <asm/unaligned.h>
skd: remove SCSI subsystem specific includes
skd: register block device only if some devices are present
skd: fix error messages in skd_init()
skd: fix error paths in skd_init()
skd: fix unregister_blkdev() placement
skd: more removal of bio-based code
skd: cleanup the skd_*() function block wrapping
skd: rip out bio path
skd: fix error return code in skd_pci_probe()
s390/dasd: hold request queue sysfs lock when calling elevator_init()
cciss: return 0 from driver probe function on success, not 1
...
Linus Torvalds [Thu, 14 Nov 2013 03:08:14 +0000 (12:08 +0900)]
Merge branch 'for-3.13/core' of git://git.kernel.dk/linux-block
Pull block IO core updates from Jens Axboe:
"This is the pull request for the core changes in the block layer for
3.13. It contains:
- The new blk-mq request interface.
This is a new and more scalable queueing model that marries the
best part of the request based interface we currently have (which
is fully featured, but scales poorly) and the bio based "interface"
which the new drivers for high IOPS devices end up using because
it's much faster than the request based one.
The bio interface has no block layer support, since it taps into
the stack much earlier. This means that drivers end up having to
implement a lot of functionality on their own, like tagging,
timeout handling, requeue, etc. The blk-mq interface provides all
these. Some drivers even provide a switch to select bio or rq and
has code to handle both, since things like merging only works in
the rq model and hence is faster for some workloads. This is a
huge mess. Conversion of these drivers nets us a substantial code
reduction. Initial results on converting SCSI to this model even
shows an 8x improvement on single queue devices. So while the
model was intended to work on the newer multiqueue devices, it has
substantial improvements for "classic" hardware as well. This code
has gone through extensive testing and development, it's now ready
to go. A pull request is coming to convert virtio-blk to this
model will be will be coming as well, with more drivers scheduled
for 3.14 conversion.
- Two blktrace fixes from Jan and Chen Gang.
- A plug merge fix from Alireza Haghdoost.
- Conversion of __get_cpu_var() from Christoph Lameter.
- Fix for sector_div() with 64-bit divider from Geert Uytterhoeven.
- A fix for a race between request completion and the timeout
handling from Jeff Moyer. This is what caused the merge conflict
with blk-mq/core, in case you are looking at that.
- A dm stacking fix from Mike Snitzer.
- A code consolidation fix and duplicated code removal from Kent
Overstreet.
- A handful of block bug fixes from Mikulas Patocka, fixing a loop
crash and memory corruption on blk cg.
- Elevator switch bug fix from Tomoki Sekiyama.
A heads-up that I had to rebase this branch. Initially the immutable
bio_vecs had been queued up for inclusion, but a week later, it became
clear that it wasn't fully cooked yet. So the decision was made to
pull this out and postpone it until 3.14. It was a straight forward
rebase, just pruning out the immutable series and the later fixes of
problems with it. The rest of the patches applied directly and no
further changes were made"
* 'for-3.13/core' of git://git.kernel.dk/linux-block: (31 commits)
block: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
block: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
block: Do not call sector_div() with a 64-bit divisor
kernel: trace: blktrace: remove redundent memcpy() in compat_blk_trace_setup()
block: Consolidate duplicated bio_trim() implementations
block: Use rw_copy_check_uvector()
block: Enable sysfs nomerge control for I/O requests in the plug list
block: properly stack underlying max_segment_size to DM device
elevator: acquire q->sysfs_lock in elevator_change()
elevator: Fix a race in elevator switching and md device initialization
block: Replace __get_cpu_var uses
bdi: test bdi_init failure
block: fix a probe argument to blk_register_region
loop: fix crash if blk_alloc_queue fails
blk-core: Fix memory corruption if blkcg_init_queue fails
block: fix race between request completion and timeout handling
blktrace: Send BLK_TN_PROCESS events to all running traces
blk-mq: don't disallow request merges for req->special being set
blk-mq: mq plug list breakage
blk-mq: fix for flush deadlock
...
Linus Torvalds [Wed, 13 Nov 2013 23:56:27 +0000 (08:56 +0900)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs
Pull VFS fixes from Al Viro:
"Several fixes, mostly for regressions in the last pile. Howeover,
prepend_path() forgetting to reininitalize dentry/vfsmount is in 3.12
as well and qib_fs had been leaking all along..."
The unpaired RCU lock issue was also independently reported by Dave
Jones with his fuzzer tool..
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
qib_fs: fix (some) dcache abuses
prepend_path() needs to reinitialize dentry/vfsmount/mnt on restarts
fix unpaired rcu lock in prepend_path()
locks: missing unlock on error in generic_add_lease()
aio: checking for NULL instead of IS_ERR
Linus Torvalds [Wed, 13 Nov 2013 23:51:29 +0000 (08:51 +0900)]
Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm
Pull ARM updates from Russell King:
"Included in this series are:
1. BE8 (modern big endian) changes for ARM from Ben Dooks
2. big.Little support from Nicolas Pitre and Dave Martin
3. support for LPAE systems with all system memory above 4GB
4. Perf updates from Will Deacon
5. Additional prefetching and other performance improvements from Will.
6. Neon-optimised AES implementation fro Ard.
7. A number of smaller fixes scattered around the place.
There is a rather horrid merge conflict in tools/perf - I was never
notified of the conflict because it originally occurred between Will's
tree and other stuff. Consequently I have a resolution which Will
forwarded me, which I'll forward on immediately after sending this
mail.
The other notable thing is I'm expecting some build breakage in the
crypto stuff on ARM only with Ard's AES patches. These were merged
into a stable git branch which others had already pulled, so there's
little I can do about this. The problem is caused because these
patches have a dependency on some code in the crypto git tree - I
tried requesting a branch I can pull to resolve these, and all I got
each time from the crypto people was "we'll revert our patches then"
which would only make things worse since I still don't have the
dependent patches. I've no idea what's going on there or how to
resolve that, and since I can't split these patches from the rest of
this pull request, I'm rather stuck with pushing this as-is or
reverting Ard's patches.
Since it should "come out in the wash" I've left them in - the only
build problems they seem to cause at the moment are with randconfigs,
and since it's a new feature anyway. However, if by -rc1 the
dependencies aren't in, I think it'd be best to revert Ard's patches"
I resolved the perf conflict roughly as per the patch sent by Russell,
but there may be some differences. Any errors are likely mine. Let's
see how the crypto issues work out..
* 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (110 commits)
ARM: 7868/1: arm/arm64: remove atomic_clear_mask() in "include/asm/atomic.h"
ARM: 7867/1: include: asm: use 'int' instead of 'unsigned long' for 'oldval' in atomic_cmpxchg().
ARM: 7866/1: include: asm: use 'long long' instead of 'u64' within atomic.h
ARM: 7871/1: amba: Extend number of IRQS
ARM: 7887/1: Don't smp_cross_call() on UP devices in arch_irq_work_raise()
ARM: 7872/1: Support arch_irq_work_raise() via self IPIs
ARM: 7880/1: Clear the IT state independent of the Thumb-2 mode
ARM: 7878/1: nommu: Implement dummy early_paging_init()
ARM: 7876/1: clear Thumb-2 IT state on exception handling
ARM: 7874/2: bL_switcher: Remove cpu_hotplug_driver_{lock,unlock}()
ARM: footbridge: fix build warnings for netwinder
ARM: 7873/1: vfp: clear vfp_current_hw_state for dying cpu
ARM: fix misplaced arch_virt_to_idmap()
ARM: 7848/1: mcpm: Implement cpu_kill() to synchronise on powerdown
ARM: 7847/1: mcpm: Factor out logical-to-physical CPU translation
ARM: 7869/1: remove unused XSCALE_PMU Kconfig param
ARM: 7864/1: Handle 64-bit memory in case of 32-bit phys_addr_t
ARM: 7863/1: Let arm_add_memory() always use 64-bit arguments
ARM: 7862/1: pcpu: replace __get_cpu_var_uses
ARM: 7861/1: cacheflush: consolidate single-CPU ARMv7 cache disabling code
...
Linus Torvalds [Wed, 13 Nov 2013 22:55:21 +0000 (07:55 +0900)]
Merge branch 'for-linus-dma-masks' of git://git.linaro.org/people/rmk/linux-arm
Pull DMA mask updates from Russell King:
"This series cleans up the handling of DMA masks in a lot of drivers,
fixing some bugs as we go.
Some of the more serious errors include:
- drivers which only set their coherent DMA mask if the attempt to
set the streaming mask fails.
- drivers which test for a NULL dma mask pointer, and then set the
dma mask pointer to a location in their module .data section -
which will cause problems if the module is reloaded.
To counter these, I have introduced two helper functions:
- dma_set_mask_and_coherent() takes care of setting both the
streaming and coherent masks at the same time, with the correct
error handling as specified by the API.
- dma_coerce_mask_and_coherent() which resolves the problem of
drivers forcefully setting DMA masks. This is more a marker for
future work to further clean these locations up - the code which
creates the devices really should be initialising these, but to fix
that in one go along with this change could potentially be very
disruptive.
The last thing this series does is prise away some of Linux's addition
to "DMA addresses are physical addresses and RAM always starts at
zero". We have ARM LPAE systems where all system memory is above 4GB
physical, hence having DMA masks interpreted by (eg) the block layers
as describing physical addresses in the range 0..DMAMASK fails on
these platforms. Santosh Shilimkar addresses this in this series; the
patches were copied to the appropriate people multiple times but were
ignored.
Fixing this also gets rid of some ARM weirdness in the setup of the
max*pfn variables, and brings ARM into line with every other Linux
architecture as far as those go"
* 'for-linus-dma-masks' of git://git.linaro.org/people/rmk/linux-arm: (52 commits)
ARM: 7805/1: mm: change max*pfn to include the physical offset of memory
ARM: 7797/1: mmc: Use dma_max_pfn(dev) helper for bounce_limit calculations
ARM: 7796/1: scsi: Use dma_max_pfn(dev) helper for bounce_limit calculations
ARM: 7795/1: mm: dma-mapping: Add dma_max_pfn(dev) helper function
ARM: 7794/1: block: Rename parameter dma_mask to max_addr for blk_queue_bounce_limit()
ARM: DMA-API: better handing of DMA masks for coherent allocations
ARM: 7857/1: dma: imx-sdma: setup dma mask
DMA-API: firmware/google/gsmi.c: avoid direct access to DMA masks
DMA-API: dcdbas: update DMA mask handing
DMA-API: dma: edma.c: no need to explicitly initialize DMA masks
DMA-API: usb: musb: use platform_device_register_full() to avoid directly messing with dma masks
DMA-API: crypto: remove last references to 'static struct device *dev'
DMA-API: crypto: fix ixp4xx crypto platform device support
DMA-API: others: use dma_set_coherent_mask()
DMA-API: staging: use dma_set_coherent_mask()
DMA-API: usb: use new dma_coerce_mask_and_coherent()
DMA-API: usb: use dma_set_coherent_mask()
DMA-API: parport: parport_pc.c: use dma_coerce_mask_and_coherent()
DMA-API: net: octeon: use dma_coerce_mask_and_coherent()
DMA-API: net: nxp/lpc_eth: use dma_coerce_mask_and_coherent()
...
Al Viro [Wed, 13 Nov 2013 12:52:33 +0000 (07:52 -0500)]
qib_fs: fix (some) dcache abuses
* lookup_one_len() really wants i_mutex held on directory.
* leaks galore - just mount ipathfs, then
cd /sys/bus/pci/drivers/qib_ib; echo *:*:*.* >unbind
on a box with that card present and try to umount ipathfs...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Peter Zijlstra [Wed, 13 Nov 2013 03:42:14 +0000 (19:42 -0800)]
block: Use u64_stats_init() to initialize seqcounts
Now that seqcounts are lockdep enabled objects, we need to explicitly
initialize runtime allocated seqcounts so that lockdep can track them.
Without this patch, Fengguang was seeing:
[ 4.127282] INFO: trying to register non-static key.
[ 4.128027] the code is fine but needs lockdep annotation.
[ 4.128027] turning off the locking correctness validator.
[ 4.128027] CPU: 0 PID: 96 Comm: kworker/u4:1 Not tainted
3.12.0-next-20131108-10601-gbad570d #2
[ 4.128027] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ ... ]
[ 4.128027] Call Trace:
[ 4.128027] [<
7908e744>] ? console_unlock+0x353/0x380
[ 4.128027] [<
79dc7cf2>] dump_stack+0x48/0x60
[ 4.128027] [<
7908953e>] __lock_acquire.isra.26+0x7e3/0xceb
[ 4.128027] [<
7908a1c5>] lock_acquire+0x71/0x9a
[ 4.128027] [<
794079aa>] ? blk_throtl_bio+0x1c3/0x485
[ 4.128027] [<
7940658b>] throtl_update_dispatch_stats+0x7c/0x153
[ 4.128027] [<
794079aa>] ? blk_throtl_bio+0x1c3/0x485
[ 4.128027] [<
794079aa>] blk_throtl_bio+0x1c3/0x485
...
Use u64_stats_init() for all affected data structures, which initializes
the seqcount.
Reported-and-Tested-by: Fengguang Wu <fengguang.wu@intel.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
[ Folded in another fix from the mailing list as well as a fix to that fix. Tweaked commit message. ]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1384314134-6895-1-git-send-email-john.stultz@linaro.org
[ So I actually think that the two SOBs from PeterZ are the right depiction of the patch route. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Fengguang Wu [Fri, 8 Nov 2013 16:55:35 +0000 (00:55 +0800)]
locking/lockdep: Mark __lockdep_count_forward_deps() as static
There are new Sparse warnings:
>> kernel/locking/lockdep.c:1235:15: sparse: symbol '__lockdep_count_forward_deps' was not declared. Should it be static?
>> kernel/locking/lockdep.c:1261:15: sparse: symbol '__lockdep_count_backward_deps' was not declared. Should it be static?
Please consider folding the attached diff :-)
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/527d1787.ThzXGoUspZWehFDl\%fengguang.wu@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Al Viro [Wed, 13 Nov 2013 12:45:40 +0000 (07:45 -0500)]
prepend_path() needs to reinitialize dentry/vfsmount/mnt on restarts
... and equivalent is needed in 3.12; it's broken there as well
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Li Zhong [Wed, 13 Nov 2013 07:21:51 +0000 (15:21 +0800)]
fix unpaired rcu lock in prepend_path()
Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Michal Nazarewicz [Sun, 10 Nov 2013 19:42:01 +0000 (20:42 +0100)]
sched/fair: Avoid integer overflow
sa->runnable_avg_sum is of type u32 but after shifting it by NICE_0_SHIFT
bits it is promoted to u64. This of course makes no sense, since the
result will never be more then 32-bit long. Casting sa->runnable_avg_sum
to u64 before it is shifted, fixes this problem.
Reviewed-by: Ben Segall <bsegall@google.com>
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1384112521-25177-1-git-send-email-mpn@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Peter Zijlstra [Mon, 11 Nov 2013 17:21:56 +0000 (18:21 +0100)]
sched: Optimize task_sched_runtime()
Large multi-threaded apps like to hit this using do_sys_times() and
then queue up on the rq->lock.
Avoid when possible.
Larry reported ~20% performance increase his test case.
Reported-by: Larry Woodman <lwoodman@redhat.com>
Suggested-by: Paul Turner <pjt@google.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20131111172925.GG26898@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Peter Zijlstra [Wed, 6 Nov 2013 17:47:57 +0000 (18:47 +0100)]
sched/numa: Cure update_numa_stats() vs. hotplug
Because we're completely unserialized against hotplug its well
possible to try and generate numa stats for an offlined node.
Bail out early (and avoid a /0) in this case. The resulting stats are
all 0 which should result in an undesirable balance target -- not to
mention that actually trying to migrate to an offline CPU will fail.
Reported-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Mel Gorman <mgorman@suse.de>
Link: http://lkml.kernel.org/n/tip-orja0qylcvyhxfsuebcyL5sI@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Rik van Riel [Tue, 12 Nov 2013 00:29:25 +0000 (19:29 -0500)]
sched/numa: Fix NULL pointer dereference in task_numa_migrate()
The cpusets code can split up the scheduler's domain tree into
smaller domains. Some of those smaller domains may not cross
NUMA nodes at all, leading to a NULL pointer dereference on the
per-cpu sd_numa pointer.
Tasks cannot be migrated out of their domain, so the patch
also sets p->numa_preferred_nid to whereever they are, to
prevent the migration from being retried over and over again.
Reported-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Mel Gorman <mgorman@suse.de>
Link: http://lkml.kernel.org/n/tip-oosqomw0Jput0Jkvoowhrqtu@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Michael wang [Wed, 13 Nov 2013 03:10:56 +0000 (11:10 +0800)]
sched: Fix endless sync_sched/rcu() loop inside _cpu_down()
Commit
6acce3ef8:
sched: Remove get_online_cpus() usage
tries to do sync_sched/rcu() inside _cpu_down() but triggers:
INFO: task swapper/0:1 blocked for more than 120 seconds.
...
[<
ffffffff811263dc>] synchronize_rcu+0x2c/0x30
[<
ffffffff81d1bd82>] _cpu_down+0x2b2/0x340
...
It was caused by that in the rcu boost case we rely on smpboot thread to
finish the rcu callback, which has already been parked before sync in here
and leads to the endless sync_sched/rcu().
This patch exchanges the sequence of smpboot_park_threads() and
sync_sched/rcu() to fix the bug.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Tested-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Michael Wang <wangyun@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/5282EDC0.6060003@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Dan Carpenter [Wed, 13 Nov 2013 07:56:27 +0000 (10:56 +0300)]
locks: missing unlock on error in generic_add_lease()
We should unlock here before returning.
Fixes:
df4e8d2c1d2b ('locks: implement delegations')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Dan Carpenter [Wed, 13 Nov 2013 07:49:40 +0000 (10:49 +0300)]
aio: checking for NULL instead of IS_ERR
alloc_anon_inode() returns an ERR_PTR(), it doesn't return NULL.
Fixes:
71ad7490c1f3 ('rework aio migrate pages to use aio fs')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Linus Torvalds [Wed, 13 Nov 2013 08:40:34 +0000 (17:40 +0900)]
Merge git://git./linux/kernel/git/davem/net-next
Pull networking updates from David Miller:
1) The addition of nftables. No longer will we need protocol aware
firewall filtering modules, it can all live in userspace.
At the core of nftables is a, for lack of a better term, virtual
machine that executes byte codes to inspect packet or metadata
(arriving interface index, etc.) and make verdict decisions.
Besides support for loading packet contents and comparing them, the
interpreter supports lookups in various datastructures as
fundamental operations. For example sets are supports, and
therefore one could create a set of whitelist IP address entries
which have ACCEPT verdicts attached to them, and use the appropriate
byte codes to do such lookups.
Since the interpreted code is composed in userspace, userspace can
do things like optimize things before giving it to the kernel.
Another major improvement is the capability of atomically updating
portions of the ruleset. In the existing netfilter implementation,
one has to update the entire rule set in order to make a change and
this is very expensive.
Userspace tools exist to create nftables rules using existing
netfilter rule sets, but both kernel implementations will need to
co-exist for quite some time as we transition from the old to the
new stuff.
Kudos to Patrick McHardy, Pablo Neira Ayuso, and others who have
worked so hard on this.
2) Daniel Borkmann and Hannes Frederic Sowa made several improvements
to our pseudo-random number generator, mostly used for things like
UDP port randomization and netfitler, amongst other things.
In particular the taus88 generater is updated to taus113, and test
cases are added.
3) Support 64-bit rates in HTB and TBF schedulers, from Eric Dumazet
and Yang Yingliang.
4) Add support for new 577xx tigon3 chips to tg3 driver, from Nithin
Sujir.
5) Fix two fatal flaws in TCP dynamic right sizing, from Eric Dumazet,
Neal Cardwell, and Yuchung Cheng.
6) Allow IP_TOS and IP_TTL to be specified in sendmsg() ancillary
control message data, much like other socket option attributes.
From Francesco Fusco.
7) Allow applications to specify a cap on the rate computed
automatically by the kernel for pacing flows, via a new
SO_MAX_PACING_RATE socket option. From Eric Dumazet.
8) Make the initial autotuned send buffer sizing in TCP more closely
reflect actual needs, from Eric Dumazet.
9) Currently early socket demux only happens for TCP sockets, but we
can do it for connected UDP sockets too. Implementation from Shawn
Bohrer.
10) Refactor inet socket demux with the goal of improving hash demux
performance for listening sockets. With the main goals being able
to use RCU lookups on even request sockets, and eliminating the
listening lock contention. From Eric Dumazet.
11) The bonding layer has many demuxes in it's fast path, and an RCU
conversion was started back in 3.11, several changes here extend the
RCU usage to even more locations. From Ding Tianhong and Wang
Yufen, based upon suggestions by Nikolay Aleksandrov and Veaceslav
Falico.
12) Allow stackability of segmentation offloads to, in particular, allow
segmentation offloading over tunnels. From Eric Dumazet.
13) Significantly improve the handling of secret keys we input into the
various hash functions in the inet hashtables, TCP fast open, as
well as syncookies. From Hannes Frederic Sowa. The key fundamental
operation is "net_get_random_once()" which uses static keys.
Hannes even extended this to ipv4/ipv6 fragmentation handling and
our generic flow dissector.
14) The generic driver layer takes care now to set the driver data to
NULL on device removal, so it's no longer necessary for drivers to
explicitly set it to NULL any more. Many drivers have been cleaned
up in this way, from Jingoo Han.
15) Add a BPF based packet scheduler classifier, from Daniel Borkmann.
16) Improve CRC32 interfaces and generic SKB checksum iterators so that
SCTP's checksumming can more cleanly be handled. Also from Daniel
Borkmann.
17) Add a new PMTU discovery mode, IP_PMTUDISC_INTERFACE, which forces
using the interface MTU value. This helps avoid PMTU attacks,
particularly on DNS servers. From Hannes Frederic Sowa.
18) Use generic XPS for transmit queue steering rather than internal
(re-)implementation in virtio-net. From Jason Wang.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1622 commits)
random32: add test cases for taus113 implementation
random32: upgrade taus88 generator to taus113 from errata paper
random32: move rnd_state to linux/random.h
random32: add prandom_reseed_late() and call when nonblocking pool becomes initialized
random32: add periodic reseeding
random32: fix off-by-one in seeding requirement
PHY: Add RTL8201CP phy_driver to realtek
xtsonic: add missing platform_set_drvdata() in xtsonic_probe()
macmace: add missing platform_set_drvdata() in mace_probe()
ethernet/arc/arc_emac: add missing platform_set_drvdata() in arc_emac_probe()
ipv6: protect for_each_sk_fl_rcu in mem_check with rcu_read_lock_bh
vlan: Implement vlan_dev_get_egress_qos_mask as an inline.
ixgbe: add warning when max_vfs is out of range.
igb: Update link modes display in ethtool
netfilter: push reasm skb through instead of original frag skbs
ip6_output: fragment outgoing reassembled skb properly
MAINTAINERS: mv643xx_eth: take over maintainership from Lennart
net_sched: tbf: support of 64bit rates
ixgbe: deleting dfwd stations out of order can cause null ptr deref
ixgbe: fix build err, num_rx_queues is only available with CONFIG_RPS
...
Linus Torvalds [Wed, 13 Nov 2013 06:45:43 +0000 (15:45 +0900)]
Merge branch 'akpm' (patches from Andrew Morton)
Merge first patch-bomb from Andrew Morton:
"Quite a lot of other stuff is banked up awaiting further
next->mainline merging, but this batch contains:
- Lots of random misc patches
- OCFS2
- Most of MM
- backlight updates
- lib/ updates
- printk updates
- checkpatch updates
- epoll tweaking
- rtc updates
- hfs
- hfsplus
- documentation
- procfs
- update gcov to gcc-4.7 format
- IPC"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (269 commits)
ipc, msg: fix message length check for negative values
ipc/util.c: remove unnecessary work pending test
devpts: plug the memory leak in kill_sb
./Makefile: export initial ramdisk compression config option
init/Kconfig: add option to disable kernel compression
drivers: w1: make w1_slave::flags long to avoid memory corruption
drivers/w1/masters/ds1wm.cuse dev_get_platdata()
drivers/memstick/core/ms_block.c: fix unreachable state in h_msb_read_page()
drivers/memstick/core/mspro_block.c: fix attributes array allocation
drivers/pps/clients/pps-gpio.c: remove redundant of_match_ptr
kernel/panic.c: reduce 1 byte usage for print tainted buffer
gcov: reuse kbasename helper
kernel/gcov/fs.c: use pr_warn()
kernel/module.c: use pr_foo()
gcov: compile specific gcov implementation based on gcc version
gcov: add support for gcc 4.7 gcov format
gcov: move gcov structs definitions to a gcc version specific file
kernel/taskstats.c: return -ENOMEM when alloc memory fails in add_del_listener()
kernel/taskstats.c: add nla_nest_cancel() for failure processing between nla_nest_start() and nla_nest_end()
kernel/sysctl_binary.c: use scnprintf() instead of snprintf()
...
Linus Torvalds [Wed, 13 Nov 2013 06:34:18 +0000 (15:34 +0900)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs
Pull vfs updates from Al Viro:
"All kinds of stuff this time around; some more notable parts:
- RCU'd vfsmounts handling
- new primitives for coredump handling
- files_lock is gone
- Bruce's delegations handling series
- exportfs fixes
plus misc stuff all over the place"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (101 commits)
ecryptfs: ->f_op is never NULL
locks: break delegations on any attribute modification
locks: break delegations on link
locks: break delegations on rename
locks: helper functions for delegation breaking
locks: break delegations on unlink
namei: minor vfs_unlink cleanup
locks: implement delegations
locks: introduce new FL_DELEG lock flag
vfs: take i_mutex on renamed file
vfs: rename I_MUTEX_QUOTA now that it's not used for quotas
vfs: don't use PARENT/CHILD lock classes for non-directories
vfs: pull ext4's double-i_mutex-locking into common code
exportfs: fix quadratic behavior in filehandle lookup
exportfs: better variable name
exportfs: move most of reconnect_path to helper function
exportfs: eliminate unused "noprogress" counter
exportfs: stop retrying once we race with rename/remove
exportfs: clear DISCONNECTED on all parents sooner
exportfs: more detailed comment for path_reconnect
...
Linus Torvalds [Wed, 13 Nov 2013 06:31:13 +0000 (15:31 +0900)]
Merge tag 'dlm-3.13' of git://git./linux/kernel/git/teigland/linux-dlm
Pull dlm fix from David Teigland:
"This set includes a single fix to resolve to a race that could cause
lockspace shutdown to incorrectly return -EBUSY"
* tag 'dlm-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm:
dlm: Avoid that dlm_release_lockspace() incorrectly returns -EBUSY
Linus Torvalds [Wed, 13 Nov 2013 06:29:38 +0000 (15:29 +0900)]
Merge tag 'upstream-3.13-rc1' of git://git.infradead.org/linux-ubi
Pull UBI changes from Artem Bityutskiy:
"A bunch of fixes for the fastmap feature, which is still new and
rather experimental. It looks like it starts getting more users.
No significant changes for the "classical" non-fastmap UBI"
* tag 'upstream-3.13-rc1' of git://git.infradead.org/linux-ubi:
UBI: Add some asserts to ubi_attach_fastmap()
UBI: Fix memory leak in ubi_attach_fastmap() error path
UBI: simplify image sequence test
UBI: fastmap: fix backward compatibility with image_seq
UBI: Call scan_all() with correct offset in error case
UBI: Fix error path in scan_pool()
UBI: fix refill_wl_user_pool()
Linus Torvalds [Wed, 13 Nov 2013 06:28:45 +0000 (15:28 +0900)]
Merge tag 'upstream-3.13-rc1' of git://git.infradead.org/linux-ubifs
Pull ubifs changes from Artem Bityutskiy:
"Mostly fixes for the power cut emulation UBIFS mode, and only one
functional change which fixes a return error code"
* tag 'upstream-3.13-rc1' of git://git.infradead.org/linux-ubifs:
UBIFS: correct data corruption range
UBIFS: fix return code
UBIFS: remove unnecessary code in ubifs_garbage_collect
Linus Torvalds [Wed, 13 Nov 2013 06:27:00 +0000 (15:27 +0900)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mszeredi/fuse
Pull fuse updates from Miklos Szeredi:
"This adds a ->writepage() implementation to fuse, improving mmaped
writeout and paving the way for buffered writeback.
And there's a patch to add a fix minor number for /dev/cuse, similarly
to /dev/fuse"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: writepages: protect secondary requests from fuse file release
fuse: writepages: update bdi writeout when deleting secondary request
fuse: writepages: crop secondary requests
fuse: writepages: roll back changes if request not found
cuse: add fix minor number to /dev/cuse
fuse: writepage: skip already in flight
fuse: writepages: handle same page rewrites
fuse: writepages: fix aggregation
fuse: fix race in fuse_writepages()
fuse: Implement writepages callback
fuse: don't BUG on no write file
fuse: lock page in mkwrite
fuse: Prepare to handle multiple pages in writeback
fuse: Getting file for writeback helper
Linus Torvalds [Wed, 13 Nov 2013 06:25:47 +0000 (15:25 +0900)]
Merge branch 'for_linus' of git://git./linux/kernel/git/jack/linux-fs
Pull ext[23], udf and quota fixes from Jan Kara:
"Assorted fixes in quota, ext2, ext3 & udf.
Probably the most important is a fix of fs corruption issue in ext2
XIP support (OTOH xip is rarely used)"
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
ext2: Fix fs corruption in ext2_get_xip_mem()
quota: info leak in quota_getquota()
jbd: Revert "jbd: remove dependency on __GFP_NOFAIL"
udf: fix for pathetic mount times in case of invalid file system
ext3: Count journal as bsddf overhead in ext3_statfs
Linus Torvalds [Wed, 13 Nov 2013 06:24:40 +0000 (15:24 +0900)]
Merge tag 'for-f2fs-3.13' of git://git./linux/kernel/git/jaegeuk/f2fs
Pull f2fs updates from Jaegeuk Kim:
"This patch-set includes the following major enhancement patches.
- add a sysfs to control reclaiming free segments
- enhance the f2fs global lock procedures
- enhance the victim selection flow
- wait for selected node blocks during fsync
- add some tracepoints
- add a config to remove abundant BUG_ONs
The other bug fixes are as follows.
- fix deadlock on acl operations
- fix some bugs with respect to orphan inodes
And, there are a bunch of cleanups"
* tag 'for-f2fs-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (42 commits)
f2fs: issue more large discard command
f2fs: fix memory leak after kobject init failed in fill_super
f2fs: cleanup waiting routine for writeback pages in cp
f2fs: avoid to use a NULL point in destroy_segment_manager
f2fs: remove unnecessary TestClearPageError when wait pages writeback
f2fs: update f2fs document
f2fs: avoid to wait all the node blocks during fsync
f2fs: check all ones or zeros bitmap with bitops for better mount performance
f2fs: change the method of calculating the number summary blocks
f2fs: fix calculating incorrect free size when update xattr in __f2fs_setxattr
f2fs: add an option to avoid unnecessary BUG_ONs
f2fs: introduce CONFIG_F2FS_CHECK_FS for BUG_ON control
f2fs: fix a deadlock during init_acl procedure
f2fs: clean up acl flow for better readability
f2fs: remove unnecessary segment bitmap updates
f2fs: add tracepoint for vm_page_mkwrite
f2fs: add tracepoint for set_page_dirty
f2fs: remove redundant set_page_dirty from write_compacted_summaries
f2fs: add reclaiming control by sysfs
f2fs: introduce f2fs_balance_fs_bg for some background jobs
...
Linus Torvalds [Wed, 13 Nov 2013 06:21:53 +0000 (15:21 +0900)]
Merge branch 'for-3.13' of git://git./linux/kernel/git/tj/cgroup
Pull cgroup changes from Tejun Heo:
"Not too much activity this time around. css_id is finally killed and
a minor update to device_cgroup"
* 'for-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
device_cgroup: remove can_attach
cgroup: kill css_id
memcg: stop using css id
memcg: fail to create cgroup if the cgroup id is too big
memcg: convert to use cgroup id
memcg: convert to use cgroup_is_descendant()
Linus Torvalds [Wed, 13 Nov 2013 06:18:22 +0000 (15:18 +0900)]
Merge branch 'for-3.13' of git://git./linux/kernel/git/tj/libata
Pull libata changes from Tejun Heo:
"Nothing too interesting. Only two minor fixes in libata core. Most
changes are specific to hardware which isn't too common"
* 'for-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
ahci: Add Device IDs for Intel Wildcat Point-LP
sata_rcar: Convert to clk_prepare/unprepare
drivers/libata: Set max sector to 65535 for Slimtype DVD A DS8A9SH drive
libata: Add some missing command descriptions
sata_highbank: clear whole array in highbank_initialize_phys()
ahci: disabled FBS prior to issuing software reset
libata: Fix display of sata speed
ahci: imx: setup power saving methods
ata_piix: minor typo and a printk fix
ahci: Changing two module params with static and __read_mostly
Linus Torvalds [Wed, 13 Nov 2013 06:17:16 +0000 (15:17 +0900)]
Merge branch 'for-3.13' of git://git./linux/kernel/git/tj/percpu
Pull percpu changes from Tejun Heo:
"Two smallish changes for percpu. Two patches to remove unused
this_cpu_xor() and one to fix a bug in percpu init failure path so
that it can reach the proper BUG() instead of oopsing earlier"
* 'for-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
x86: remove this_cpu_xor() implementation
percpu: remove this_cpu_xor() implementation
percpu: fix bootmem error handling in pcpu_page_first_chunk()
Mathias Krause [Tue, 12 Nov 2013 23:11:47 +0000 (15:11 -0800)]
ipc, msg: fix message length check for negative values
On 64 bit systems the test for negative message sizes is bogus as the
size, which may be positive when evaluated as a long, will get truncated
to an int when passed to load_msg(). So a long might very well contain a
positive value but when truncated to an int it would become negative.
That in combination with a small negative value of msg_ctlmax (which will
be promoted to an unsigned type for the comparison against msgsz, making
it a big positive value and therefore make it pass the check) will lead to
two problems: 1/ The kmalloc() call in alloc_msg() will allocate a too
small buffer as the addition of alen is effectively a subtraction. 2/ The
copy_from_user() call in load_msg() will first overflow the buffer with
userland data and then, when the userland access generates an access
violation, the fixup handler copy_user_handle_tail() will try to fill the
remainder with zeros -- roughly 4GB. That almost instantly results in a
system crash or reset.
,-[ Reproducer (needs to be run as root) ]--
| #include <sys/stat.h>
| #include <sys/msg.h>
| #include <unistd.h>
| #include <fcntl.h>
|
| int main(void) {
| long msg = 1;
| int fd;
|
| fd = open("/proc/sys/kernel/msgmax", O_WRONLY);
| write(fd, "-1", 2);
| close(fd);
|
| msgsnd(0, &msg, 0xfffffff0, IPC_NOWAIT);
|
| return 0;
| }
'---
Fix the issue by preventing msgsz from getting truncated by consistently
using size_t for the message length. This way the size checks in
do_msgsnd() could still be passed with a negative value for msg_ctlmax but
we would fail on the buffer allocation in that case and error out.
Also change the type of m_ts from int to size_t to avoid similar nastiness
in other code paths -- it is used in similar constructs, i.e. signed vs.
unsigned checks. It should never become negative under normal
circumstances, though.
Setting msg_ctlmax to a negative value is an odd configuration and should
be prevented. As that might break existing userland, it will be handled
in a separate commit so it could easily be reverted and reworked without
reintroducing the above described bug.
Hardening mechanisms for user copy operations would have catched that bug
early -- e.g. checking slab object sizes on user copy operations as the
usercopy feature of the PaX patch does. Or, for that matter, detect the
long vs. int sign change due to truncation, as the size overflow plugin
of the very same patch does.
[akpm@linux-foundation.org: fix i386 min() warnings]
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Pax Team <pageexec@freemail.hu>
Cc: Davidlohr Bueso <davidlohr@hp.com>
Cc: Brad Spengler <spender@grsecurity.net>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: <stable@vger.kernel.org> [ v2.3.27+ -- yes, that old ;) ]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Xie XiuQi [Tue, 12 Nov 2013 23:11:46 +0000 (15:11 -0800)]
ipc/util.c: remove unnecessary work pending test
Remove unnecessary work pending test before calling schedule_work(). It
has been tested in queue_work_on() already. No functional changed.
Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>
Cc: Tejun Heo <tj@kernel.org>
Reviewed-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ilija Hadzic [Tue, 12 Nov 2013 23:11:45 +0000 (15:11 -0800)]
devpts: plug the memory leak in kill_sb
When devpts is unmounted, there may be a no-longer-used IDR tree hanging
off the superblock we are about to kill. This needs to be cleaned up
before destroying the SB.
The leak is usually not a big deal because unmounting devpts is typically
done when shutting down the whole machine. However, shutting down an LXC
container instead of a physical machine exposes the problem (the garbage
is detectable with kmemleak).
Signed-off-by: Ilija Hadzic <ihadzic@research.bell-labs.com>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
P J P [Tue, 12 Nov 2013 23:11:44 +0000 (15:11 -0800)]
./Makefile: export initial ramdisk compression config option
Make menuconfig allows one to choose compression format of an initial
ramdisk image. But this choice does not result in duly compressed ramdisk
image. Because - $ make install - does not pass on the selected
compression choice to the dracut(8) tool, which creates the initramfs
file. dracut(8) generates the image with the default compression, ie.
gzip(1).
This patch exports the selected compression option to a sub-shell
environment, so that it could be used by dracut(8) tool to generate
appropriately compressed initramfs images.
There isn't a straightforward way to pass on options to dracut(8) via
positional parameters. Because it is indirectly invoked at the end of a $
make install sequence.
# make install
-> arch/$arch/boot/Makefile
-> arch/$arch/boot/install.sh
-> /sbing/installkernel ...
-> /sbin/new-kernel-pkg ...
-> /sbin/dracut ...
Signed-off-by: P J P <ppandit@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Christian Ruppert [Tue, 12 Nov 2013 23:11:43 +0000 (15:11 -0800)]
init/Kconfig: add option to disable kernel compression
Some ARC users say they can boot faster with without kernel compression.
This probably depends on things like the FLASH chip they use etc.
Until now, kernel compression can only be disabled by removing "select
HAVE_<compression>" lines from the architecture Kconfig. So add the
Kconfig logic to permit disabling of kernel compression.
Signed-off-by: Christian Ruppert <christian.ruppert@abilis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michal Nazarewicz [Tue, 12 Nov 2013 23:11:42 +0000 (15:11 -0800)]
drivers: w1: make w1_slave::flags long to avoid memory corruption
On architectures where long is more then 32 bits, modifying a 32-bit field
with set_bit (and other atomic bit operations) may cause bytes following
the field to by modified.
Because the endianness of the bits within a field is the native endianness
of the CPU[1], on big-endian machines, bit number zero is in the last byte
of the field.
Therefore, `set_bit(0, ptr)' on a 64-bit big-endian machine is roughly
equivalent to `((char *)ptr)[7] |= 1', and since w1 driver uses a 32-bit
field for holding the flags, this causes bytes beyond the field to be
modified.
[1] From Documentation/atomic_ops.txt:
Native atomic bit operations are defined to operate on objects
aligned to the size of an "unsigned long" C data type, and are
least of that size. The endianness of the bits within each
"unsigned long" are the native endianness of the cpu.
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Cc: Evgeniy Polyakov <zbr@ioremap.net>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jingoo Han [Tue, 12 Nov 2013 23:11:41 +0000 (15:11 -0800)]
drivers/w1/masters/ds1wm.cuse dev_get_platdata()
Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly. This is a cosmetic change to make
the code simpler and enhance the readability.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Roger Tseng [Tue, 12 Nov 2013 23:11:40 +0000 (15:11 -0800)]
drivers/memstick/core/ms_block.c: fix unreachable state in h_msb_read_page()
In h_msb_read_page() in ms_block.c, flow never reaches case
MSB_RP_RECIVE_STATUS_REG. This causes error when MEMSTICK_INT_ERR is
encountered and status error bits are going to be examined, but the status
will never be copied back.
Fix it by transitioning to MSB_RP_RECIVE_STATUS_REG right after
MSB_RP_SEND_READ_STATUS_REG.
Signed-off-by: Roger Tseng <rogerable@realtek.com>
Acked-by: Maxim Levitsky <maximlevitsky@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michal Nazarewicz [Tue, 12 Nov 2013 23:11:39 +0000 (15:11 -0800)]
drivers/memstick/core/mspro_block.c: fix attributes array allocation
attrs field of attribute_group structure is a pointer to a pointer (as in
an array of pointers) rather than pointer to attribute struct (as in an
array of structures), so when allocating size of the pointer sholud be
used instead of the structure it is pointing to.
While at it, also change the call to use kcalloc rather than kzalloc.
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Alex Dubov <oakad@yahoo.com>
Cc: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Sachin Kamat [Tue, 12 Nov 2013 23:11:33 +0000 (15:11 -0800)]
drivers/pps/clients/pps-gpio.c: remove redundant of_match_ptr
The data structure of_match_ptr() protects is always compiled in. Hence
of_match_ptr() is not needed.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Chen Gang [Tue, 12 Nov 2013 23:11:32 +0000 (15:11 -0800)]
kernel/panic.c: reduce 1 byte usage for print tainted buffer
sizeof("Tainted: ") already counts '\0', and after first sprintf(), 's'
will start from the current string end (its' value is '\0').
So need not add additional 1 byte for maximized usage of 'buf' in
print_tainted().
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andy Shevchenko [Tue, 12 Nov 2013 23:11:31 +0000 (15:11 -0800)]
gcov: reuse kbasename helper
To get name of the file from a pathname let's use kbasename() helper.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andrew Morton [Tue, 12 Nov 2013 23:11:29 +0000 (15:11 -0800)]
kernel/gcov/fs.c: use pr_warn()
pr_warning() is deprecated in favor of pr_warn()
Cc: Andy Gospodarek <agospoda@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Frantisek Hrbata <fhrbata@redhat.com>
Cc: Jan Stancek <jstancek@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andrew Morton [Tue, 12 Nov 2013 23:11:28 +0000 (15:11 -0800)]
kernel/module.c: use pr_foo()
kernel/module.c uses a mix of printk(KERN_foo and pr_foo(). Convert it
all to pr_foo and make the offered cleanups.
Not sure what to do about the printk(KERN_DEFAULT). We don't have a
pr_default().
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Joe Perches <joe@perches.com>
Cc: Frantisek Hrbata <fhrbata@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Frantisek Hrbata [Tue, 12 Nov 2013 23:11:27 +0000 (15:11 -0800)]
gcov: compile specific gcov implementation based on gcc version
Compile the correct gcov implementation file for the specific gcc version.
Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com>
Cc: Jan Stancek <jstancek@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Acked-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Andy Gospodarek <agospoda@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Frantisek Hrbata [Tue, 12 Nov 2013 23:11:26 +0000 (15:11 -0800)]
gcov: add support for gcc 4.7 gcov format
The gcov in-memory format changed in gcc 4.7. The biggest change, which
requires this special implementation, is that gcov_info no longer contains
array of counters for each counter type for all functions and gcov_fn_info
is not used for mapping of function's counters to these arrays(offset).
Now each gcov_fn_info contans it's counters, which makes things a little
bit easier.
This is heavily based on the previous gcc_3_4.c implementation and patches
provided by Peter Oberparleiter. Specially the buffer gcda implementation
for iterator.
[akpm@linux-foundation.org: use kmemdup() and kcalloc()]
[oberpar@linux.vnet.ibm.com: gcc_4_7.c needs vmalloc.h]
Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com>
Cc: Jan Stancek <jstancek@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Andy Gospodarek <agospoda@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Frantisek Hrbata [Tue, 12 Nov 2013 23:11:24 +0000 (15:11 -0800)]
gcov: move gcov structs definitions to a gcc version specific file
Since also the gcov structures(gcov_info, gcov_fn_info, gcov_ctr_info) can
change between gcc releases, as shown in gcc 4.7, they cannot be defined
in a common header and need to be moved to a specific gcc implemention
file. This also requires to make the gcov_info structure opaque for the
common code and to introduce simple helpers for accessing data inside
gcov_info.
Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com>
Cc: Jan Stancek <jstancek@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Acked-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Andy Gospodarek <agospoda@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / log