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: <[email protected]> # 3.9+ Acked-by: Naoya Horiguchi <[email protected]> Signed-off-by: Wanpeng Li <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
