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Subject: Re: [PATCH][GIT PULL] tracing: Fix compile issue for
 trace_sched_wakeup.c
From: Steven Rostedt <rostedt@goodmis.org>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Jason Baron <jbaron@redhat.com>, Ingo Molnar <mingo@elte.hu>,
        LKML <linux-kernel@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Thomas Gleixner <tglx@linutronix.de>, "H. Peter Anvin" <hpa@zytor.com>,
        Arnaldo Carvalho de Melo <acme@redhat.com>, tj@kernel.org
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Date: Fri, 22 Oct 2010 10:36:55 -0400
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On Fri, 2010-10-22 at 16:23 +0200, Peter Zijlstra wrote:
> On Fri, 2010-10-22 at 10:13 -0400, Jason Baron wrote:

> Can this be reproduced in qemu? I don't have a i386-smp machine around
> to use.
> 
> Could you trace the thing with all sched (except the sched_stat)
> tracepoints enabled? I think there's a sysrq key to dump the trace once
> the machine's stuck.. 
> 
> Hopefully that disables ftrace before it starts dumping otherwise the
> dump is useless -- Steven?

The ftrace_dump_on_oops does disable ftrace before it runs.

-- Steve