linux-kernel - Re: frequent softlockups with 3.10rc6.

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Message-ID: <1372551690.18733.367.camel@gandalf.local.home>
Date:	Sat, 29 Jun 2013 20:21:30 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Dave Jones <davej@...hat.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Dave Chinner <david@...morbit.com>,
	Oleg Nesterov <oleg@...hat.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andrey Vagin <avagin@...nvz.org>
Subject: Re: frequent softlockups with 3.10rc6.

On Sat, 2013-06-29 at 19:44 -0400, Dave Jones wrote:

> Yeah, this is running as a user. Those don't sound like things that should
> be possible.  What instrumentation could I add to figure out why 
> that kthread got awakened ?


trace-cmd record -e sched_wakeup -f 'comm ~ "migrati*"'

Add "-O stacktrace" to see where they got woken up too.

-- Steve


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