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From: Shaohua Li <shaohua.li@intel.com>
To: Nathan Lynch <ntl@pobox.com>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
	Andrew Morton <akpm@osdl.org>
Subject: Re: [PATCH] softlockup detection vs. cpu hotplug
Date: Fri, 24 Feb 2006 09:31:53 +0800	[thread overview]
Message-ID: <1140744713.16880.4.camel@sli10-desk.sh.intel.com> (raw)
In-Reply-To: <20060224003146.GJ3293@localhost.localdomain>

On Fri, 2006-02-24 at 08:31 +0800, Nathan Lynch wrote:
> 
> In the watchdog thread, do touch_softlockup_watchdog in a 
> non-preemptible section so that it won't touch another cpu's 
> timestamp.  This can happen in the window between the watchdog thread 
> getting forcefully migrated during a cpu offline operation and 
> kthread_should_stop.
Could we stop the thread in CPU_DOWN_PREPARE case, so it will not be
migrated to other CPUs? I suppose it's better the per-cpu thread only
runs on the specific cpu.

Thanks,
Shaohua


  reply	other threads:[~2006-02-24  1:32 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-02-24  0:31 Nathan Lynch
2006-02-24  1:31 ` Shaohua Li [this message]
2006-02-24  6:25 ` Ingo Molnar

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