Date: Mon, 17 Jun 2013 10:16:51 -0700
From: Tejun Heo <tj@kernel.org>
To: Michal Hocko <mhocko@suse.cz>
Cc: lizefan@huawei.com, containers@lists.linux-foundation.org,
        cgroups@vger.kernel.org, koverstreet@google.com,
        linux-kernel@vger.kernel.org, cl@linux-foundation.org,
        Mike Snitzer <snitzer@redhat.com>, Vivek Goyal <vgoyal@redhat.com>,
        "Alasdair G. Kergon" <agk@redhat.com>, Jens Axboe <axboe@kernel.dk>,
        Mikulas Patocka <mpatocka@redhat.com>,
        Glauber Costa <glommer@gmail.com>
Subject: Re: [PATCH 11/11] cgroup: use percpu refcnt for cgroup_subsys_states
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Hello, Michal.

On Mon, Jun 17, 2013 at 03:27:44PM +0200, Michal Hocko wrote:
> Thanks for your results! Yes the boost can be really high. I will try to
> measure some memcg workloads as soon as I have some spare cycles. I do
> not expect a big win but I also do not think this would regress.

With the just committed RCU-sched conversion, the slowdown even on
single CPU configuration w/ CONFIG_PREEMPT should be in the range of a
few percent points in the worst cases and will mostly be in the noise
in any realistic scenarios.  So, yeah, looks pretty good to me. :)

Thanks.

-- 
tejun
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