From: "Jason J. Herne" <jjherne@linux.vnet.ibm.com>
To: Peter Zijlstra <peterz@infradead.org>,
Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Sasha Levin <sasha.levin@oracle.com>, Tejun Heo <tj@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Dave Jones <davej@redhat.com>, Ingo Molnar <mingo@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Steven Rostedt <rostedt@goodmis.org>
Subject: Re: workqueue: WARN at at kernel/workqueue.c:2176
Date: Tue, 27 May 2014 10:18:31 -0400 [thread overview]
Message-ID: <53849EB7.9090302@linux.vnet.ibm.com> (raw)
In-Reply-To: <20140516162945.GZ11096@twins.programming.kicks-ass.net>
On 05/16/2014 12:29 PM, Peter Zijlstra wrote:
> On Sat, May 17, 2014 at 12:18:06AM +0800, Lai Jiangshan wrote:
>> so the scheduler/set_cpus_allowed_ptr()/cpu_active_mask should be the first
>> place to fix.
>
> I'm not arguing about that, not to mention that this is userspace
> exposed and nobody protects that.
>
> But I was expecting kernel stuff that calls it on hotplug to be
> serialized thusly, but apparently not so.
>
Was a final patch posted for this issue? The discussion made it sound
like there were still a few things to figure out before we could resolve
this bug. I can recreate this as needed and I'm happy to test any patches.
--
-- Jason J. Herne (jjherne@linux.vnet.ibm.com)
next prev parent reply other threads:[~2014-05-27 14:19 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-12 18:58 workqueue: WARN at at kernel/workqueue.c:2176 Sasha Levin
2014-05-12 20:01 ` Tejun Heo
2014-05-13 2:19 ` Lai Jiangshan
2014-05-13 2:17 ` Sasha Levin
2014-05-14 16:52 ` Jason J. Herne
2014-05-16 3:50 ` Lai Jiangshan
2014-05-16 9:35 ` Peter Zijlstra
2014-05-16 9:56 ` Lai Jiangshan
2014-05-16 10:29 ` Peter Zijlstra
2014-05-16 10:15 ` Peter Zijlstra
2014-05-16 10:16 ` Peter Zijlstra
2014-05-16 10:39 ` Peter Zijlstra
2014-05-16 11:57 ` Peter Zijlstra
2014-05-16 12:08 ` Tejun Heo
2014-05-16 12:14 ` Thomas Gleixner
2014-05-16 12:16 ` Tejun Heo
2014-05-16 16:18 ` Lai Jiangshan
2014-05-16 16:29 ` Peter Zijlstra
2014-05-27 14:18 ` Jason J. Herne [this message]
2014-05-27 14:26 ` Peter Zijlstra
2014-05-29 16:23 ` Jason J. Herne
2014-06-03 11:24 ` Lai Jiangshan
2014-06-03 12:45 ` Lai Jiangshan
2014-06-03 14:28 ` Peter Zijlstra
2014-06-04 1:47 ` Lai Jiangshan
2014-06-03 14:16 ` Peter Zijlstra
2014-06-04 2:27 ` Lai Jiangshan
2014-06-04 6:49 ` Peter Zijlstra
2014-06-04 8:25 ` Lai Jiangshan
2014-06-04 9:39 ` Peter Zijlstra
2014-06-05 10:54 ` Lai Jiangshan
2014-06-05 15:22 ` Jason J. Herne
2014-06-06 12:39 ` Jason J. Herne
2014-06-06 13:36 ` Peter Zijlstra
2014-06-08 2:50 ` Lai Jiangshan
2014-09-01 3:04 ` Lai Jiangshan
2014-09-03 15:15 ` Peter Zijlstra
2014-09-04 2:22 ` Lai Jiangshan
2014-09-04 6:39 ` Peter Zijlstra
2014-06-09 14:01 ` Jason J. Herne
2014-06-10 1:21 ` Lai Jiangshan
2014-06-16 1:30 ` Lai Jiangshan
2014-09-09 14:52 ` [tip:sched/core] sched: Migrate waking tasks tip-bot for Lai Jiangshan
2014-09-10 7:38 ` Kirill Tkhai
2014-09-10 7:53 ` Peter Zijlstra
2014-06-04 2:28 ` workqueue: WARN at at kernel/workqueue.c:2176 Lai Jiangshan
2014-06-04 6:48 ` Peter Zijlstra
2014-05-19 13:07 ` [tip:sched/core] sched: Fix hotplug vs set_cpus_allowed_ptr() tip-bot for Lai Jiangshan
2014-05-22 12:26 ` [tip:sched/core] sched: Fix hotplug vs. set_cpus_allowed_ptr() tip-bot for Lai Jiangshan
2014-05-22 22:02 ` Srivatsa S. Bhat
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