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| author | Minchan Kim <minchan.kim@gmail.com> | 2011-05-11 15:13:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-11 18:50:44 -0700 |
| commit | bad49d9c89d8755a1289d68e6d0127a6ee79e119 (patch) | |
| tree | cae49afedfa97a2ba02dd4e7987e469a60fa2b65 | |
| parent | 52cd4e5c620af9e21b5298bf01844b98573505a7 (diff) | |
| download | lwn-bad49d9c89d8755a1289d68e6d0127a6ee79e119.tar.gz lwn-bad49d9c89d8755a1289d68e6d0127a6ee79e119.zip | |
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
diff --git a/mm/swap.c b/mm/swap.c index a448db377cb0..5602f1a1b1e7 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -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; |