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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/memory-failure.c | |
| parent | f4c18e6f7b5bbb5b528b3334115806b0d76f50f9 (diff) | |
| download | linux-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/memory-failure.c')
| -rw-r--r-- | mm/memory-failure.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index cd985530f102..ea5a93659488 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1659,6 +1659,8 @@ static int __soft_offline_page(struct page *page, int flags) inc_zone_page_state(page, NR_ISOLATED_ANON + page_is_file_cache(page)); list_add(&page->lru, &pagelist); + if (!TestSetPageHWPoison(page)) + atomic_long_inc(&num_poisoned_pages); ret = migrate_pages(&pagelist, new_page, NULL, MPOL_MF_MOVE_ALL, MIGRATE_SYNC, MR_MEMORY_FAILURE); if (ret) { @@ -1673,9 +1675,8 @@ static int __soft_offline_page(struct page *page, int flags) pfn, ret, page->flags); if (ret > 0) ret = -EIO; - } else { - if (!TestSetPageHWPoison(page)) - atomic_long_inc(&num_poisoned_pages); + if (TestClearPageHWPoison(page)) + atomic_long_dec(&num_poisoned_pages); } } else { pr_info("soft offline: %#lx: isolation failed: %d, page count %d, type %lx\n", |