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mm: check PageUnevictable in lru_deactivate_fn()

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The lru_deactivate_fn should not move page which in on unevictable lru
into inactive list.  Otherwise, we can meet BUG when we use
isolate_lru_pages as __isolate_lru_page could return -EINVAL.

Reported-by: Ying Han <yinghan@google.com>
Tested-by: Ying Han <yinghan@google.com>
Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: Rik van Riel<riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Minchan Kim 2011-05-11 15:13:30 -07:00 committed by Linus Torvalds
parent 52cd4e5c62
commit bad49d9c89
1 changed files with 3 additions and 0 deletions
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3
mm/swap.c
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@ -396,6 +396,9 @@ static void lru_deactivate_fn(struct page *page, void *arg)
if (!PageLRU(page))
return;
if (PageUnevictable(page))
return;
/* Some processes are using the page */
if (page_mapped(page))
return;