From: Li Zefan <lizf@cn.fujitsu.com>
To: Mike Galbraith <mgalbraith@suse.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
Paul Menage <paul@paulmenage.org>,
David Rientjes <rientjes@google.com>
Subject: Re: [patch] cpusets: allow PF_THREAD_BOUND kworkers to escape from a cpuset
Date: Fri, 23 Sep 2011 15:00:15 +0800 [thread overview]
Message-ID: <4E7C2E7F.40307@cn.fujitsu.com> (raw)
In-Reply-To: <1316758874.7393.2.camel@marge.simson.net>
cc David, who added this restriction
于 2011年09月23日 14:21, Mike Galbraith wrote:
>
> kworkers can be born in a cpuset, leaving them adrift on an unsinkable ship.
> Allow them to be moved to the root cpuset so the cpuset can be destroyed.
>
> Signed-off-by: Mike Galbraith <efault@gmx.de>
>
I've noticed this long ago, so..
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
> diff --git a/kernel/cpuset.c b/kernel/cpuset.c
> index 10131fd..b26f4c4 100644
> --- a/kernel/cpuset.c
> +++ b/kernel/cpuset.c
> @@ -1384,7 +1384,7 @@ static int cpuset_can_attach(struct cgroup_subsys *ss, struct cgroup *cont,
> * set_cpus_allowed_ptr() on all attached tasks before cpus_allowed may
> * be changed.
> */
> - if (tsk->flags & PF_THREAD_BOUND)
> + if (tsk->flags & PF_THREAD_BOUND && cont->parent)
To make the code more self-explanatory, I think this is a bit better:
if (... && cont != cont->top_cgroup)
> return -EINVAL;
>
> return 0;
>
next prev parent reply other threads:[~2011-09-23 6:59 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-23 6:21 Mike Galbraith
2011-09-23 7:00 ` Li Zefan [this message]
2011-09-23 7:19 ` Mike Galbraith
2011-09-23 9:12 ` David Rientjes
2011-09-23 9:42 ` Mike Galbraith
2011-09-23 10:53 ` Mike Galbraith
2011-09-23 13:27 ` David Rientjes
2011-09-23 14:33 ` Mike Galbraith
2011-09-23 18:16 ` Mike Galbraith
2011-09-23 20:20 ` David Rientjes
2011-09-24 3:21 ` Tejun Heo
2011-10-10 5:34 ` Mike Galbraith
2011-10-10 8:03 ` [patch] cpusets, cgroups: disallow attaching kthreadd Mike Galbraith
2011-10-10 16:43 ` Tejun Heo
2011-10-11 2:31 ` Mike Galbraith
2011-10-11 14:08 ` Peter Zijlstra
2011-10-11 16:57 ` Mike Galbraith
2011-10-12 1:22 ` David Rientjes
2011-10-12 1:45 ` Mike Galbraith
2011-10-12 1:20 ` David Rientjes
2011-10-18 8:10 ` patch] " Mike Galbraith
2011-10-18 8:16 ` David Rientjes
2011-10-18 8:42 ` Peter Zijlstra
2011-10-18 8:47 ` Mike Galbraith
2011-10-18 9:06 ` Peter Zijlstra
2011-10-18 9:23 ` Mike Galbraith
2011-10-18 10:11 ` Mike Galbraith
2011-10-18 20:38 ` David Rientjes
2011-10-19 4:00 ` Mike Galbraith
2011-10-19 4:53 ` Paul Menage
2011-10-19 4:56 ` Paul Menage
2011-10-19 5:28 ` Mike Galbraith
2011-10-19 7:50 ` Peter Zijlstra
2011-10-19 19:47 ` David Rientjes
2011-10-20 10:32 ` Peter Zijlstra
2011-10-20 21:24 ` David Rientjes
2011-10-19 4:57 ` Paul Menage
2011-10-19 5:24 ` [patch-final] " Mike Galbraith
2011-10-19 7:54 ` Peter Zijlstra
2011-10-19 8:00 ` Paul Menage
2011-10-19 8:21 ` Mike Galbraith
2011-10-26 20:27 ` David Rientjes
2011-11-10 20:51 ` David Rientjes
2011-12-06 20:13 ` David Rientjes
2011-12-06 22:47 ` Andrew Morton
2011-12-06 23:53 ` David Rientjes
2011-12-07 0:05 ` Andrew Morton
2011-12-07 3:18 ` [resubmit] " Mike Galbraith
2011-12-07 4:36 ` Mike Galbraith
2011-12-07 22:03 ` David Rientjes
2011-12-14 20:16 ` Andrew Morton
2011-12-15 2:50 ` David Rientjes
2012-01-06 22:06 ` Andrew Morton
2012-01-07 6:34 ` Mike Galbraith
2012-01-07 7:59 ` Andrew Morton
2011-12-07 22:01 ` David Rientjes
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