linux-kernel - Re: [PATCH 5/7] memcg: get rid of once-per-second cache shrinking for dead memcgs

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Message-ID: <50A4F289.1090807@parallels.com>
Date:	Thu, 15 Nov 2012 17:47:53 +0400
From:	Glauber Costa <glommer@...allels.com>
To:	Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>, <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>, Tejun Heo <tj@...nel.org>,
	Michal Hocko <mhocko@...e.cz>,
	Johannes Weiner <hannes@...xchg.org>,
	Christoph Lameter <cl@...ux.com>,
	Pekka Enberg <penberg@...nel.org>
Subject: Re: [PATCH 5/7] memcg: get rid of once-per-second cache shrinking
 for dead memcgs

On 11/15/2012 01:41 PM, Kamezawa Hiroyuki wrote:
> (2012/11/15 11:54), Glauber Costa wrote:
>> The idea is to synchronously do it, leaving it up to the shrinking
>> facilities in vmscan.c and/or others. Not actively retrying shrinking
>> may leave the caches alive for more time, but it will remove the ugly
>> wakeups. One would argue that if the caches have free objects but are
>> not being shrunk, it is because we don't need that memory yet.
>>
>> Signed-off-by: Glauber Costa <glommer@...allels.com>
>> CC: Michal Hocko <mhocko@...e.cz>
>> CC: Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
>> CC: Johannes Weiner <hannes@...xchg.org>
>> CC: Andrew Morton <akpm@...ux-foundation.org>
> 
> I agree this patch but can we have a way to see the number of unaccounted
> zombie cache usage for debugging ?
> 
> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> 
Any particular interface in mind ?


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