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Date: Fri, 03 Aug 2012 12:17:15 -0400
From: Rik van Riel <riel@redhat.com>
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Subject: Re: [PATCH V8 2/2] mm: memcg detect no memcgs above softlimit under
 zone reclaim
References: <1343942664-13365-1-git-send-email-yinghan@google.com> <20120803140224.GC8434@dhcp22.suse.cz>
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To: Michal Hocko <mhocko@suse.cz>
Cc: Ying Han <yinghan@google.com>, Johannes Weiner <hannes@cmpxchg.org>, Mel Gorman <mel@csn.ul.ie>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>, Hillf Danton <dhillf@gmail.com>, Hugh Dickins <hughd@google.com>, KOSAKI Motohiro <kosaki.motohiro@gmail.com>, Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org

On 08/03/2012 10:02 AM, Michal Hocko wrote:
> On Thu 02-08-12 14:24:24, Ying Han wrote:
		shrink_lruvec(lruvec, sc);
>>
>> +			if (!mem_cgroup_is_root(memcg))
>> +				over_softlimit = true;
>> +		}
>> +
>
> I think this is still not sufficient because you do not want to hammer
> root in the ignore_softlimit case.

Michal, please see my mail from a few days ago, describing how I
plan to balance pressure between the various LRU lists.

I hope to throw a prototype patch over the wall soon...

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