linux-kernel - Re: [PATCH v4] sched/numa: fix unsafe get_task_struct() in task_numa

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Message-ID: <20141110160320.GA10501@worktop.programming.kicks-ass.net>
Date:	Mon, 10 Nov 2014 17:03:20 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Sasha Levin <sasha.levin@...cle.com>
Cc:	Kirill Tkhai <ktkhai@...allels.com>, linux-kernel@...r.kernel.org,
	Oleg Nesterov <oleg@...hat.com>,
	Ingo Molnar <mingo@...hat.com>,
	Vladimir Davydov <vdavydov@...allels.com>,
	Kirill Tkhai <tkhai@...dex.ru>
Subject: Re: [PATCH v4] sched/numa: fix unsafe get_task_struct() in
 task_numa_assign()

On Fri, Nov 07, 2014 at 10:48:27PM -0500, Sasha Levin wrote:
> [  829.539183] BUG: spinlock recursion on CPU#10, trinity-c594/11067
> [  829.539203]  lock: 0xffff880631dd6b80, .magic: dead4ead, .owner: trinity-c594/11067, .owner_cpu: 13

Ooh, look at that. CPU#10 vs .owner_cpu: 13 on the _same_ task.

One of those again :/
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