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Date: Wed, 4 Mar 2009 17:46:35 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Bharata B Rao <bharata.rao@gmail.com>, LKML <linux-kernel@vger.kernel.org>,
       Peter Zijlstra <a.p.zijlstra@chello.nl>, paulmck@linux.vnet.ibm.com,
       Li Zefan <lizf@cn.fujitsu.com>, Ingo Molnar <mingo@elte.hu>,
       Paul Menage <menage@google.com>,
       Balbir Singh <balbir@linux.vnet.ibm.com>, kenchen@google.com
Subject: Re: [PATCH] remove rq->lock from cpuacct cgroup v2
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On Wed, 4 Mar 2009 17:20:05 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:

> On Wed, 4 Mar 2009 13:24:43 +0530
> Bharata B Rao <bharata.rao@gmail.com> wrote:
> At first, generic per-cpu counter sounds interesting but to be honest,
> some special handling is used for cpuacct based on its characteristic.
> 
>   - Writer works under non-preemptable context.
>   - There is only one writer.
> 
If utime/stime updates works on above context, using the same code will be good.

I don't use any cpuacct structure specific in routines...
If you want me to rewrite it, I'll do. please request what you want.

Thanks,
-Kame