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

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Date:	Wed, 3 Oct 2007 13:31:17 -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:
>
> So far as I can tell, this patch just removes a minor optimization,

It's not minor for any subsystem that has a non-trivial attach() operation.

>
> Any further suggestions, or embarrassing (;) questions?
>

What was wrong with my suggestion from a couple of emails back? Adding
the following in cpuset_attach():

struct cgroup_iter it;
struct task_struct *p;
while ((p = cgroup_iter_next(cs->css.cgroup, &it))) {
       set_cpus_allowed(p, cs->cpus_allowed);
}
cgroup_iter_end(cs->css.cgroup, &it);

Paul
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