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From: Jason Baron <jbaron@redhat.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>,
	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>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Arnaldo Carvalho de Melo <acme@redhat.com>,
	masami.hiramatsu.pt@hitachi.com
Subject: Re: [PATCH][GIT PULL] tracing: Fix compile issue for trace_sched_wakeup.c
Date: Wed, 20 Oct 2010 12:43:24 -0400	[thread overview]
Message-ID: <20101020164324.GC7348@redhat.com> (raw)
In-Reply-To: <20101020154045.GA18353@elte.hu>

On Wed, Oct 20, 2010 at 05:40:45PM +0200, Ingo Molnar wrote:
> FYI, there's a new mystery hang (sometimes crash) that triggers in -tip - and which 
> seems to be tracing related. See the crashlog below - config attached.
> 
> It's not bisectable - small changes in the kernel make the bug come/go. (might be a 
> race of some sorts)
> 
> Thanks,
> 
> 	Ingo
> 

strange b/c it looks like we get though enabling/disabling the
tracepoitns individually, but then when we go to enable all the
tracepoints we hit this hang - perhaps, suggesting a race. Do we always
fail after "Testing all events:" is printed? Does the crash have any
more clues. I will try and re-produce this.

Also, I noticed some recent changes to text_poke_smp() usage of
stop_machine() on Oct. 14th. That's related to the area where this appears
to hang, so if things were working with this .config before then, that
might be a place to look. Adding Masami to the 'cc list.

thanks,

-Jason

  parent reply	other threads:[~2010-10-20 16:44 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-10-19 17:11 [PATCH][GIT PULL] tracing: Fix compile issue for trace_sched_wakeup.c Steven Rostedt
2010-10-19 18:41 ` Ingo Molnar
2010-10-20 15:40   ` Ingo Molnar
2010-10-20 16:37     ` Steven Rostedt
2010-10-20 18:40       ` Ingo Molnar
2010-10-20 16:43     ` Jason Baron [this message]
2010-10-20 18:33       ` Ingo Molnar
2010-10-21 11:09         ` Ingo Molnar
2010-10-22 17:58           ` Jason Baron
2010-10-22 18:24             ` Ingo Molnar
2010-10-22 18:39               ` Jason Baron
2010-10-23 20:02                 ` Ingo Molnar
2010-10-24  0:53                   ` Steven Rostedt
2010-10-24 11:25                     ` Ingo Molnar
2010-10-25  8:59                       ` Ingo Molnar
2010-10-25  9:30                         ` Ingo Molnar
2010-10-25 11:45                           ` Ingo Molnar
2010-10-25 12:10                             ` Ingo Molnar
2010-10-25 12:18                               ` Peter Zijlstra
2010-10-25 12:32                                 ` Ingo Molnar
2010-10-25 15:47                                 ` Peter Zijlstra
2010-10-25 16:07                                   ` Peter Zijlstra
2010-10-25 17:25                                   ` Ingo Molnar
2010-10-25 17:32                                     ` Ingo Molnar
2010-10-25 17:45                                   ` Peter Zijlstra
2010-10-25 17:52                                     ` Jason Baron
2010-10-30 10:42                                     ` [tip:perf/urgent] jump label: Add work around to i386 gcc asm goto bug tip-bot for Steven Rostedt
2010-10-25 15:55                   ` [PATCH][GIT PULL] tracing: Fix compile issue for trace_sched_wakeup.c Jason Baron
2010-10-25 16:09                     ` Peter Zijlstra
2010-10-22 21:42               ` Jason Baron
2010-10-23  4:41                 ` Steven Rostedt
2010-10-21  2:58       ` Masami Hiramatsu
2010-10-21  7:22         ` Peter Zijlstra
2010-10-21 11:01           ` Steven Rostedt
2010-10-21 11:03             ` Peter Zijlstra
2010-10-21 12:45               ` Steven Rostedt
2010-10-21 13:50               ` Jason Baron
2010-10-22  4:56               ` Masami Hiramatsu
2010-10-21 14:00         ` Jason Baron
2010-10-21 11:14     ` Steven Rostedt
2010-10-21 11:26       ` Ingo Molnar
2010-10-21 13:55         ` Jason Baron
2010-10-21 14:43           ` Ingo Molnar
2010-10-22  1:44         ` Jason Baron
2010-10-22  8:14           ` Peter Zijlstra
2010-10-22 14:13             ` Jason Baron
2010-10-22 14:23               ` Peter Zijlstra
2010-10-22 14:36                 ` Steven Rostedt
2010-10-22 14:36                 ` Jason Baron
2010-10-22  8:16           ` Tejun Heo

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