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authorWanpeng Li <wanpeng.li@hotmail.com>2015-08-14 15:34:56 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-08-14 15:56:32 -0700
commit4f32be677b124a49459e2603321c7a5605ceb9f8 (patch)
treed089b9b516727b913071bdf24fad723e4abc79e2
parent7ddab73346a1277b90fd6a4d044bc948f9cc9ad8 (diff)
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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>
-rw-r--r--mm/memory-failure.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index ea5a93659488..81c20a7c9fa7 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1538,6 +1538,8 @@ static int get_any_page(struct page *page, unsigned long pfn, int flags)
*/
ret = __get_any_page(page, pfn, 0);
if (!PageLRU(page)) {
+ /* Drop page reference which is from __get_any_page() */
+ put_page(page);
pr_info("soft_offline: %#lx: unknown non LRU page type %lx\n",
pfn, page->flags);
return -EIO;