linux-kernel - Re: rcu,sched: spinlock recursion on 3.5-rc2

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Message-ID: <1339515061.4999.102.camel@lappy>
Date:	Tue, 12 Jun 2012 17:31:01 +0200
From:	Sasha Levin <levinsasha928@...il.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Dave Jones <davej@...hat.com>
Subject: Re: rcu,sched: spinlock recursion on 3.5-rc2

On Tue, 2012-06-12 at 17:15 +0200, Peter Zijlstra wrote:
> On Tue, 2012-06-12 at 17:07 +0200, Thomas Gleixner wrote:
> > Hmm, not sure. The deadlock was not triggered in switch_to. It was
> > just at the beginning of __schedule()
> > 
> > 
> How can you tell? switch_to() is a macro not a function, it won't ever
> show up on a stack-trace.. but I think you meant context_switch() but
> that typically gets inlined, similar problem.

addr2line -i confirmed it was pointing to switch_to(), if it matters.

btw, wouldn't it be nice if there were a short script that would take an
oops and convert all those kernel addresses into file+line numbers based
on a given vmlinux? It would make our lives so much easier.

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