mm/hwpoison: fix page refcount of unknown non LRU page
authorWanpeng Li <wanpeng.li@hotmail.com>
Fri, 14 Aug 2015 22:34:56 +0000 (15:34 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 14 Aug 2015 22:56:32 +0000 (15:56 -0700)
commit4f32be677b124a49459e2603321c7a5605ceb9f8
treed089b9b516727b913071bdf24fad723e4abc79e2
parent7ddab73346a1277b90fd6a4d044bc948f9cc9ad8
mm/hwpoison: fix page refcount of unknown non LRU page

After trying to drain pages from pagevec/pageset, we try to get reference
count of the page again, however, the reference count of the page is not
reduced if the page is still not on LRU list.

Fix it by adding the put_page() to drop the page reference which is from
__get_any_page().

Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: <stable@vger.kernel.org> [3.9+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/memory-failure.c