linux-kernel - Re: [PATCH][GIT PULL] tracing: Fix compile issue for trace_sched

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Message-ID: <1287758215.16971.638.camel@gandalf.stny.rr.com>
Date:	Fri, 22 Oct 2010 10:36:55 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Jason Baron <jbaron@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>, tj@...nel.org
Subject: Re: [PATCH][GIT PULL] tracing: Fix compile issue for
 trace_sched_wakeup.c

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


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