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Date: Mon, 18 Nov 2013 09:54:39 +0100
From: Peter Zijlstra <peterz@infradead.org>
To: Vince Weaver <vincent.weaver@maine.edu>
Cc: LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@kernel.org>,
        Paul Mackerras <paulus@samba.org>,
        Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
        Stephane Eranian <eranian@google.com>
Subject: Re: perf sw_event related lockup
Message-ID: <20131118085439.GD3866@twins.programming.kicks-ass.net>
References: <alpine.DEB.2.10.1311131739560.5706@vincent-weaver-1.um.maine.edu>
 <20131115145944.GA3694@twins.programming.kicks-ass.net>
 <alpine.DEB.2.10.1311151223040.11932@vincent-weaver-1.um.maine.edu>
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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.