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HWPOISON: comment dirty swapcache pages
author
Wu Fengguang
<fengguang.wu@intel.com>
Wed, 16 Dec 2009 11:19:58 +0000
(12:19 +0100)
committer
Andi Kleen
<ak@linux.intel.com>
Wed, 16 Dec 2009 11:19:58 +0000
(12:19 +0100)
AK: Improve comment
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
mm/memory.c
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diff --git
a/mm/memory.c
b/mm/memory.c
index a54b2c498444dca8d8b41bb59d65640915f1a684..db09106ed44b7a4aa46d058c76d89a84d1322b42 100644
(file)
--- a/
mm/memory.c
+++ b/
mm/memory.c
@@
-2553,6
+2553,10
@@
static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
ret = VM_FAULT_MAJOR;
count_vm_event(PGMAJFAULT);
} else if (PageHWPoison(page)) {
+ /*
+ * hwpoisoned dirty swapcache pages are kept for killing
+ * owner processes (which may be unknown at hwpoison time)
+ */
ret = VM_FAULT_HWPOISON;
delayacct_clear_flag(DELAYACCT_PF_SWAPIN);
goto out_release;