linux-kernel - Re: perf sw_event related lockup

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Message-ID: <20131118085439.GD3866@twins.programming.kicks-ass.net>
Date:	Mon, 18 Nov 2013 09:54:39 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Vince Weaver <vincent.weaver@...ne.edu>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: perf sw_event related lockup

On Fri, Nov 15, 2013 at 12:26:16PM -0500, Vince Weaver wrote:
> On Fri, 15 Nov 2013, Peter Zijlstra wrote:
> > 
> > Please enable CONFIG_FRAME_POINTER to get better backtraces, but the
> > above suggests the pagefault swevent, will have a look.
> 
> here it is again I think.  I compiled with CONFIG_FRAME_POINTER but the 
> backtraces don't look that different.

Looks to be that other one -- the one where the intel constraints thing
goes belly up. I was hoping Stephane would look at that since I know
he's been rewriting that code.
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