linux-kernel - Re: [PATCH] task containersv11 add tasks file interface fix for cpusets

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Message-ID: <6599ad830710031358w515eb90do2596c0766f989783@mail.gmail.com>
Date:	Wed, 3 Oct 2007 13:58:26 -0700
From:	"Paul Menage" <menage@...gle.com>
To:	"Paul Jackson" <pj@....com>
Cc:	akpm@...ux-foundation.org, nickpiggin@...oo.com.au,
	a.p.zijlstra@...llo.nl, serue@...ibm.com, clg@...ibm.com,
	linux-kernel@...r.kernel.org, ebiederm@...ssion.com,
	rientjes@...gle.com, svaidy@...ux.vnet.ibm.com, xemul@...nvz.org,
	containers@...ts.osdl.org, balbir@...ux.vnet.ibm.com
Subject: Re: [PATCH] task containersv11 add tasks file interface fix for cpusets

On 10/3/07, Paul Jackson <pj@....com> wrote:
>
> But now (correct me if I'm wrong here) cgroups has a per-cgroup task
> list, and the above loop has cost linear in the number of tasks
> actually in the cgroup, plus (unfortunate but necessary and tolerable)
> the cost of taking a global css_set_lock, right?

Yes.

>
> And I take it the above code snipped is missing the cgroup_iter_start,
> correct?

Oops, yes.

Paul
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