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| author |   Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> | 2015-08-06 15:47:11 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2015-08-07 04:39:42 +0300 |
| commit | 4491f7126063ef51081f5662bd4fcae31621a333 (patch) | |
| tree | 0ebbdbf7d1eec49ec3727876524a95e48f317727 /mm/migrate.c | |
| parent | mm: check __PG_HWPOISON separately from PAGE_FLAGS_CHECK_AT_* (diff) | |
| download | linux-dev-4491f7126063ef51081f5662bd4fcae31621a333.tar.xz linux-dev-4491f7126063ef51081f5662bd4fcae31621a333.zip | |
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.c | 3 |
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; } |