From: Li Zefan <lizf@cn.fujitsu.com>
To: Paul Menage <menage@google.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH] sched: fix another race when reading /proc/sched_debug
Date: Mon, 15 Dec 2008 09:39:18 +0800 [thread overview]
Message-ID: <4945B546.5040301@cn.fujitsu.com> (raw)
In-Reply-To: <6599ad830812141347k5d7e7e08vfc17855ea0ac981c@mail.gmail.com>
Paul Menage wrote:
> I sent out some patches last week (search for hierarchy_mutex) that would
> mean that you'd only need to take a subsystem-local lock to keep a cgroup
> alive. People seemed to like them so I'll tweak them based on feedback and
> send them on to Andrew.
>
Unfortunately, AFAICS the proposed hierarchy_mutex can't solve this bug. :(
> Paul
>
> On Dec 14, 2008 4:48 AM, "Peter Zijlstra" <a.p.zijlstra@chello.nl> wrote:
>
> On Sun, 2008-12-14 at 10:54 +0800, Li Zefan wrote: > > i merged it up in
> tip/master, could you pleas...
> Can't we detect a dead task-group and skip those instead of adding this
> global lock?
>
>> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> > --- > kernel/sched_fair.c
> | 6 ++++++ > kerne...
>
next prev parent reply other threads:[~2008-12-15 1:40 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-12 9:53 [PATCH] sched: fix another race when reading /proc/sched_debug Li Zefan
2008-12-12 10:00 ` Ingo Molnar
2008-12-14 2:54 ` Li Zefan
2008-12-14 12:48 ` Peter Zijlstra
2008-12-15 1:25 ` Li Zefan
2008-12-15 8:13 ` Peter Zijlstra
2008-12-15 9:51 ` Li Zefan
2008-12-15 10:43 ` Peter Zijlstra
2008-12-15 11:08 ` KAMEZAWA Hiroyuki
2008-12-16 5:48 ` Li Zefan
2008-12-16 6:59 ` Li Zefan
2008-12-16 9:41 ` Paul Menage
2008-12-16 12:42 ` Paul Menage
2008-12-16 12:55 ` Li Zefan
2008-12-16 18:35 ` Paul Menage
[not found] ` <6599ad830812141347k5d7e7e08vfc17855ea0ac981c@mail.gmail.com>
2008-12-15 1:39 ` Li Zefan [this message]
2008-12-15 1:50 ` KAMEZAWA Hiroyuki
2008-12-15 2:11 ` Li Zefan
2008-12-16 9:23 ` Paul Menage
2008-12-16 9:39 ` Li Zefan
2008-12-19 4:37 ` Balbir Singh
2008-12-19 14:06 ` Paul Menage
2008-12-16 8:01 ` Li Zefan
2008-12-16 12:23 ` Ingo Molnar
2008-12-12 11:38 ` Bharata B Rao
2008-12-13 8:22 ` Li Zefan
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