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>
This commit is contained in:
Wanpeng Li 2015-08-14 15:34:56 -07:00 коммит произвёл Linus Torvalds
Родитель 7ddab73346
Коммит 4f32be677b
1 изменённых файлов: 2 добавлений и 0 удалений

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@ -1538,6 +1538,8 @@ static int get_any_page(struct page *page, unsigned long pfn, int flags)
*/ */
ret = __get_any_page(page, pfn, 0); ret = __get_any_page(page, pfn, 0);
if (!PageLRU(page)) { 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", pr_info("soft_offline: %#lx: unknown non LRU page type %lx\n",
pfn, page->flags); pfn, page->flags);
return -EIO; return -EIO;