linux-kernel - Re: [PATCH 1/1] sched: fix cpu

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Message-ID: <4AA9EE21.5040007@gmail.com>
Date:	Fri, 11 Sep 2009 08:28:49 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	Lai Jiangshan <laijs@...fujitsu.com>
CC:	peterz@...radead.org, rjw@...k.pl, akpm@...ux-foundation.org,
	rusty@...tcorp.com.au, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH 1/1] sched: fix cpu_down deadlock

On 09/11/2009 08:09 AM, Lai Jiangshan wrote:
> Does this bug occur when a cpu is being offlined or
> when the system is being suspended?
> Or Both?

Hi, I tried echo 0/1 > /sys/devices/system/cpu/cpu1/online in a loop,
but it didn't trigger the bug. It happened only on suspend/resume cycle
(in the end I found even swsusp in qemu suffers from this).
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