linux-kernel - Re: [RFC][PATCH 0/5] memcg: reduce lock conetion

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Message-ID: <20090828042836.GD4889@balbir.in.ibm.com>
Date:	Fri, 28 Aug 2009 09:58:36 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>
Subject: Re: [RFC][PATCH 0/5] memcg: reduce lock conetion

* KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> [2009-08-28 13:20:15]:

> Hi,
> 
> Recently, memcg's res_counter->lock contention on big server is reported and
> Balbir wrote a workaround for root memcg.
> It's good but we need some fix for children, too.
> 
> This set is for reducing lock conetion of memcg's children cgroup based on mmotm-Aug27.
> 
> I'm sorry I have only 8cpu machine and can't reproduce very troublesome lock conention.
> Here is lock_stat of make -j 12 on my 8cpu box, befre-after this patch series.
>

Kamezawa-San,

I've been unable to get mmotm to boot (24th August, I'll try the 27th
Aug and debug). Once that is done, I'll test on a large machine.
 
-- 
	Balbir
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