lkml.org 
[lkml]   [2010]   [Dec]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH] compaction: Remove mem_cgroup_del_lru
From
On Wed, Dec 8, 2010 at 6:53 AM, Andrew Morton <akpm@linux-foundation.org> wrote:
> On Wed,  8 Dec 2010 00:01:26 +0900
> Minchan Kim <minchan.kim@gmail.com> wrote:
>
>> del_page_from_lru_list alreay called mem_cgroup_del_lru.
>> So we need to call it again. It makes wrong stat of memcg and
>> even happen VM_BUG_ON hit.
>>
>> Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
>> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
>> Cc: Mel Gorman <mel@csn.ul.ie>
>> Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
>> ---
>>  mm/compaction.c |    1 -
>>  1 files changed, 0 insertions(+), 1 deletions(-)
>>
>> diff --git a/mm/compaction.c b/mm/compaction.c
>> index 50b0a90..b0fbfdf 100644
>> --- a/mm/compaction.c
>> +++ b/mm/compaction.c
>> @@ -302,7 +302,6 @@ static unsigned long isolate_migratepages(struct zone *zone,
>>               /* Successfully isolated */
>>               del_page_from_lru_list(zone, page, page_lru(page));
>>               list_add(&page->lru, migratelist);
>> -             mem_cgroup_del_lru(page);
>>               cc->nr_migratepages++;
>>               nr_isolated++;
>>
>
> err, yes, that looks bad.
>
> This bug is present in 2.6.35 and 2.6.36 afaict, so I tagged the fix
> for -stable backporting.

Thanks, Andrew.

>
>



--
Kind regards,
Minchan Kim
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2010-12-07 23:21    [W:0.100 / U:0.396 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site