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Re: [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c

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From: Miklos Vajna
Subject: Re: [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c
Date: Wednesday, December 22, 2010 - 4:39 pm

On Wed, Dec 22, 2010 at 10:11:51PM +0100, Miklos Vajna <vmiklos@frugalware.org> wrote:

I spoke too early. After some trying, it seems I can reproduce with
current -git as well. (But as Peter points out it's harder to
reproduce.)

Just in case it's interesting, I attached the -git dmesg. From a quick
look the trace is the same as with v2.6.36, which is easy to reproduce.
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Messages in current thread:
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Peter Zijlstra, (Tue Jun 29, 3:43 am)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., shenghui, (Tue Jun 29, 4:24 am)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Peter Zijlstra, (Tue Jun 29, 4:35 am)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Miklos Vajna, (Sat Dec 18, 7:03 pm)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Miklos Vajna, (Tue Dec 21, 5:22 pm)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Peter Zijlstra, (Wed Dec 22, 1:29 am)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Peter Zijlstra, (Wed Dec 22, 1:41 am)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Mike Galbraith, (Wed Dec 22, 1:41 am)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Peter Zijlstra, (Wed Dec 22, 2:07 am)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Miklos Vajna, (Wed Dec 22, 6:31 am)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Peter Zijlstra, (Wed Dec 22, 7:00 am)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Peter Zijlstra, (Wed Dec 22, 7:11 am)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Miklos Vajna, (Wed Dec 22, 8:14 am)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Peter Zijlstra, (Wed Dec 22, 10:08 am)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Ingo Molnar, (Wed Dec 22, 10:16 am)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Miklos Vajna, (Wed Dec 22, 2:11 pm)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Miklos Vajna, (Wed Dec 22, 4:39 pm)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Yong Zhang, (Wed Dec 22, 7:08 pm)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Peter Zijlstra, (Thu Dec 23, 5:12 am)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Peter Zijlstra, (Thu Dec 23, 5:33 am)
Re: [PATCH] avoid race condition in pick_next_task_fair in ..., Peter Zijlstra, (Thu Dec 23, 11:24 am)
[PATCH] sched, cgroup: Use exit hook to avoid use-after-fr ..., Peter Zijlstra, (Fri Dec 24, 8:59 am)
Re: [PATCH] sched, cgroup: Use exit hook to avoid use-afte ..., Miklos Vajna, (Fri Dec 24, 9:40 am)
Re: [PATCH] sched, cgroup: Use exit hook to avoid use-afte ..., Mike Galbraith, (Fri Dec 24, 9:48 am)
Re: [PATCH] sched, cgroup: Use exit hook to avoid use-afte ..., Peter Zijlstra, (Fri Dec 24, 10:07 am)
Re: [PATCH] sched, cgroup: Use exit hook to avoid use-afte ..., Mike Galbraith, (Fri Dec 24, 10:24 am)
Re: [PATCH] sched, cgroup: Use exit hook to avoid use-afte ..., Balbir Singh, (Sat Dec 25, 10:55 am)
Re: [PATCH] sched, cgroup: Use exit hook to avoid use-afte ..., Paul Menage, (Sat Dec 25, 1:59 pm)
Re: [PATCH] sched, cgroup: Use exit hook to avoid use-afte ..., Ingo Molnar, (Wed Dec 29, 8:25 am)
Re: [PATCH] sched, cgroup: Use exit hook to avoid use-afte ..., Miklos Vajna, (Wed Dec 29, 4:07 pm)
[PATCH] Re: [PATCH] sched, cgroup: Use exit hook to avoid ..., Mike Galbraith, (Fri Dec 31, 1:32 am)
Re: [PATCH] sched, cgroup: Use exit hook to avoid use-afte ..., Mike Galbraith, (Fri Dec 31, 3:04 am)
Re: [PATCH] sched, cgroup: Use exit hook to avoid use-afte ..., Peter Zijlstra, (Mon Jan 3, 12:06 am)
Re: [PATCH] Re: [PATCH] sched, cgroup: Use exit hook to av ..., Peter Zijlstra, (Mon Jan 3, 1:21 am)
[tip:sched/core] sched, autogroup: Fix reference leak, tip-bot for Mike Gal ..., (Tue Jan 4, 7:19 am)
Re: [tip:sched/core] sched, autogroup: Fix reference leak, Oleg Nesterov, (Tue Jan 4, 7:57 am)
Re: [tip:sched/core] sched, autogroup: Fix reference leak, Mike Galbraith, (Tue Jan 4, 12:06 pm)