rmap: do not call mmu_notifier_invalidate_page() under ptl
authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Thu, 10 Aug 2017 22:24:27 +0000 (15:24 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 10 Aug 2017 22:54:07 +0000 (15:54 -0700)
commitaac2fea94f7a3df8ad1eeb477eb2643f81fd5393
tree95ee6a145bf9308130fc0c672c968bc73458f8e1
parentd041353dc98a6339182cd6f628b4c8f111278cb3
rmap: do not call mmu_notifier_invalidate_page() under ptl

MMU notifiers can sleep, but in page_mkclean_one() we call
mmu_notifier_invalidate_page() under page table lock.

Let's instead use mmu_notifier_invalidate_range() outside
page_vma_mapped_walk() loop.

[jglisse@redhat.com: try_to_unmap_one() do not call mmu_notifier under ptl]
Link: http://lkml.kernel.org/r/20170809204333.27485-1-jglisse@redhat.com
Link: http://lkml.kernel.org/r/20170804134928.l4klfcnqatni7vsc@black.fi.intel.com
Fixes: c7ab0d2fdc84 ("mm: convert try_to_unmap_one() to use page_vma_mapped_walk()")
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Reported-by: axie <axie@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Writer, Tim" <Tim.Writer@amd.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/rmap.c