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authorNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>2015-08-06 15:47:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-08-07 04:39:42 +0300
commit4491f7126063ef51081f5662bd4fcae31621a333 (patch)
tree0ebbdbf7d1eec49ec3727876524a95e48f317727 /mm/migrate.c
parentf4c18e6f7b5bbb5b528b3334115806b0d76f50f9 (diff)
downloadlinux-4491f7126063ef51081f5662bd4fcae31621a333.tar.bz2
mm/memory-failure: set PageHWPoison before migrate_pages()
Now page freeing code doesn't consider PageHWPoison as a bad page, so by setting it before completing the page containment, we can prevent the error page from being reused just after successful page migration. I added TTU_IGNORE_HWPOISON for try_to_unmap() to make sure that the page table entry is transformed into migration entry, not to hwpoison entry. Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Dean Nelson <dnelson@redhat.com> Cc: Tony Luck <tony.luck@intel.com> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Hugh Dickins <hughd@google.com> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/migrate.c')
-rw-r--r--mm/migrate.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/migrate.c b/mm/migrate.c
index f2415be7d93b..eb4267107d1f 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -880,7 +880,8 @@ static int __unmap_and_move(struct page *page, struct page *newpage,
/* Establish migration ptes or remove ptes */
if (page_mapped(page)) {
try_to_unmap(page,
- TTU_MIGRATION|TTU_IGNORE_MLOCK|TTU_IGNORE_ACCESS);
+ TTU_MIGRATION|TTU_IGNORE_MLOCK|TTU_IGNORE_ACCESS|
+ TTU_IGNORE_HWPOISON);
page_was_mapped = 1;
}