linux-kernel - Re: tracing ring_buffer

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Message-ID: <1337899781.13348.208.camel@gandalf.stny.rr.com>
Date:	Thu, 24 May 2012 18:49:41 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Dave Jones <davej@...hat.com>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: tracing ring_buffer_resize oops.

On Thu, 2012-05-24 at 16:05 -0400, Dave Jones wrote:
> On Thu, May 24, 2012 at 03:24:55PM -0400, Steven Rostedt wrote:
>  > On Thu, 2012-05-24 at 15:11 -0400, Dave Jones wrote:
>  > 
>  > >  > Also, how reproducible is it? When it triggered for me, it was constant.
>  > >  > Every boot and test failed. But after I did the make mrproper, I have
>  > >  > not been able to trigger it again. This is why I put it down as a bad
>  > >  > build.
>  > > 
>  > > happens every time for me so far.
>  > 
>  > Did you also do a make mrproper and try again?
> 
> ok, that's nasty.  Works fine after a make clean.
> 

Hmm, I did two make mrproper builds and they both failed. So this isn't
a build issue. Must just be some nasty race. I'm still leaning that this
has to do with the breakpoint function tracing updates.

Looking deeper into it.

-- Steve


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