From: Peter Zijlstra <peterz@infradead.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>,
linux-kernel@vger.kernel.org, Xiaotian Feng <dfeng@redhat.com>
Subject: Re: [PATCH 02/12] sched: Fix set_cpu_active() in cpu_down()
Date: Wed, 16 Dec 2009 18:56:19 +0100 [thread overview]
Message-ID: <1260986179.21028.151.camel@laptop> (raw)
In-Reply-To: <20091216170517.500272612@chello.nl>
On Wed, 2009-12-16 at 18:04 +0100, Peter Zijlstra wrote:
> plain text document attachment (foo13.patch)
still need to fix quilt...
From: Xiaotian Feng <dfeng@redhat.com>
> Sachin found cpu hotplug test failures on powerpc, which made the
> kernel hang on his POWER box.
>
> The problem is that we fail to re-activate a cpu when a hot-unplug
> fails. Fix this by moving the de-activation into _cpu_down after doing
> the initial checks.
>
> Remove the synchronize_sched() calls and rely on those implied by
> rebuilding the sched domains using the new mask.
>
> Reported-by: Sachin Sant <sachinp@in.ibm.com>
> Signed-off-by: Xiaotian Feng <dfeng@redhat.com>
> Tested-by: Sachin Sant <sachinp@in.ibm.com>
> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
next prev parent reply other threads:[~2009-12-16 17:56 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-16 17:04 [PATCH 00/12] sched: cleanup set_task_cpu() issues Peter Zijlstra
2009-12-16 17:04 ` [PATCH 01/12] sched: Mark boot-cpu active before smp_init() Peter Zijlstra
2009-12-16 18:36 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-16 17:04 ` [PATCH 02/12] sched: Fix set_cpu_active() in cpu_down() Peter Zijlstra
2009-12-16 17:56 ` Peter Zijlstra [this message]
2009-12-16 18:36 ` [tip:sched/urgent] " tip-bot for Xiaotian Feng
2009-12-16 17:04 ` [PATCH 03/12] sched: Fix task_hot() test order Peter Zijlstra
2009-12-16 18:37 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-16 17:04 ` [PATCH 04/12] sched: select_task_rq_fair() must honour SD_LOAD_BALANCE Peter Zijlstra
2009-12-16 18:37 ` [tip:sched/urgent] sched: Select_task_rq_fair() " tip-bot for Peter Zijlstra
2009-12-16 17:04 ` [PATCH 05/12] sched: Use TASK_WAKING for fork wakups Peter Zijlstra
2009-12-16 18:37 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-16 17:04 ` [PATCH 06/12] sched: Ensure set_task_cpu() is never called on blocked tasks Peter Zijlstra
2009-12-16 18:37 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-17 5:09 ` [tip:sched/urgent] sched: Make warning less noisy tip-bot for Ingo Molnar
2009-12-16 17:04 ` [PATCH 07/12] sched: Fix sched_exec() balancing Peter Zijlstra
2009-12-16 18:38 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-16 17:04 ` [PATCH 08/12] sched: Fix select_task_rq() vs hotplug issues Peter Zijlstra
2009-12-16 18:38 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-16 17:04 ` [PATCH 09/12] sched: Move kthread_bind() back to kthread.c Peter Zijlstra
2009-12-16 18:38 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-16 17:04 ` [PATCH 10/12] sched: Add pre and post wakeup hooks Peter Zijlstra
2009-12-16 18:38 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-16 17:04 ` [PATCH 11/12] sched: Remove the cfs_rq dependency from set_task_cpu() Peter Zijlstra
2009-12-16 18:39 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-16 17:04 ` [PATCH 12/12] sched: Simplify set_task_cpu() Peter Zijlstra
2009-12-16 18:39 ` [tip:sched/urgent] " tip-bot for Peter Zijlstra
2009-12-16 21:17 ` [PATCH 13/12] sched: remove debug check Peter Zijlstra
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