Commit 4f32be67 authored Aug 14, 2015 by Wanpeng Li Committed by Linus Torvalds Aug 14, 2015

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>

parent 7ddab733

mm/memory-failure.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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;