diff options
author | Minchan Kim <minchan.kim@gmail.com> | 2011-05-11 18:13:30 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-11 21:50:44 -0400 |
commit | bad49d9c89d8755a1289d68e6d0127a6ee79e119 (patch) | |
tree | cae49afedfa97a2ba02dd4e7987e469a60fa2b65 | |
parent | 52cd4e5c620af9e21b5298bf01844b98573505a7 (diff) |
mm: check PageUnevictable in lru_deactivate_fn()
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>
-rw-r--r-- | mm/swap.c | 3 |
1 files changed, 3 insertions, 0 deletions
@@ -396,6 +396,9 @@ static void lru_deactivate_fn(struct page *page, void *arg) | |||
396 | if (!PageLRU(page)) | 396 | if (!PageLRU(page)) |
397 | return; | 397 | return; |
398 | 398 | ||
399 | if (PageUnevictable(page)) | ||
400 | return; | ||
401 | |||
399 | /* Some processes are using the page */ | 402 | /* Some processes are using the page */ |
400 | if (page_mapped(page)) | 403 | if (page_mapped(page)) |
401 | return; | 404 | return; |