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authorWu Fengguang <fengguang.wu@intel.com>2009-12-16 12:19:58 +0100
committerAndi Kleen <ak@linux.intel.com>2009-12-16 12:19:58 +0100
commit71f72525dfaaec012e23089c73331654ea7b12d3 (patch)
tree70a8c7831ddab19be1ee8430611ad653f3e764f3
parentdb0480b3a61bd6ad86ead3b8bbad094ab0996932 (diff)
HWPOISON: comment dirty swapcache pages
AK: Improve comment Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
-rw-r--r--mm/memory.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/memory.c b/mm/memory.c
index a54b2c49844..db09106ed44 100644
--- 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;