From: Oleg Nesterov <oleg@redhat.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>, Lai Jiangshan <laijs@cn.fujitsu.com>,
Rusty Russell <rusty@rustcorp.com.au>
Cc: linux-kernel@vger.kernel.org, Li Zefan <lizf@cn.fujitsu.com>,
Miao Xie <miaox@cn.fujitsu.com>, Paul Menage <menage@google.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Gautham R Shenoy <ego@in.ibm.com>
Subject: Re: + cpu_hotplug-dont-affect-current-tasks-affinity.patch added to -mm tree
Date: Wed, 29 Jul 2009 23:21:25 +0200 [thread overview]
Message-ID: <20090729212125.GA16970@redhat.com> (raw)
In-Reply-To: <20090729023302.GA8899@redhat.com>
(add more CCs)
On 07/29, Oleg Nesterov wrote:
>
> But can't we make a much more simple patch ?
>
> Why should we play with set_cpus_allowed() at all? We can just migrate
> the caller of _cpu_down() before other tasks, right after take_cpu_down()
> does __cpu_disable()->remove_cpu_from_maps().
>
> No?
>
> Oleg.
>
> ------------------------------------------------------------------------
> Uncompiled, and we need to export move_task_off_dead_cpu(). Just to
> explain what I mean.
OK, tested. I think this should work. But first we should fix the bug
with cpusets. I'll send the patch in a minute...
Oleg.
next prev parent reply other threads:[~2009-07-29 21:25 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-29 2:33 + cpu_hotplug-dont-affect-current-tasks-affinity.patch added to -mm tree Oleg Nesterov
2009-07-29 21:21 ` Oleg Nesterov [this message]
2009-07-29 21:22 ` [PATCH] cpusets: fix deadlock with cpu_down()->cpuset_lock() Oleg Nesterov
2009-07-29 23:00 ` Oleg Nesterov
2009-07-30 1:53 ` Lai Jiangshan
2009-07-30 17:51 ` Oleg Nesterov
2009-07-31 2:23 ` Lai Jiangshan
2009-08-01 4:42 ` [PATCH] cpusets: rework guarantee_online_cpus() to fix deadlock with cpu_down() Oleg Nesterov
2009-08-01 5:34 ` Oleg Nesterov
2009-08-02 2:18 ` Lai Jiangshan
2009-08-02 6:55 ` Oleg Nesterov
2009-08-04 7:35 ` Lai Jiangshan
2009-08-04 16:36 ` Oleg Nesterov
2009-07-29 21:42 ` [PATCH 0/1] cpu_hotplug: don't play with current->cpus_allowed Oleg Nesterov
2009-07-29 21:43 ` [PATCH 1/1] " Oleg Nesterov
2009-07-30 2:01 ` Lai Jiangshan
2009-07-30 16:32 ` Oleg Nesterov
-- strict thread matches above, loose matches on Subject: below --
2009-07-22 22:03 + cpu_hotplug-dont-affect-current-tasks-affinity.patch added to -mm tree akpm
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