After try 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. This patch fix it by
adding the put_page() to drop the page reference which is from
__get_any_page().
Cc: <stable@xxxxxxxxxxxxxxx> # 3.9+
Acked-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Signed-off-by: Wanpeng Li <wanpeng.li@xxxxxxxxxxx>
---
v1 -> v2:
* add Cc stable
mm/memory-failure.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index c53543d..23163d0 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1535,6 +1535,8 @@ 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;
--
1.7.1
--
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