linux-kernel - Re: [V2 PATCH 0/6] x86, NMI: give NMI handler a face-lift

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Message-ID: <4CE2E3C3.6060800@windriver.com>
Date:	Tue, 16 Nov 2010 14:04:19 -0600
From:	Jason Wessel <jason.wessel@...driver.com>
To:	Don Zickus <dzickus@...hat.com>
CC:	Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <peterz@...radead.org>,
	Robert Richter <robert.richter@....com>, ying.huang@...el.com,
	Andi Kleen <andi@...stfloor.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [V2 PATCH 0/6] x86, NMI: give NMI handler a face-lift

On 11/16/2010 12:43 PM, Don Zickus wrote:
> On Fri, Nov 12, 2010 at 12:27:55PM -0500, Don Zickus wrote:
>
> Hi Jason,
>
>   
>>> I tested 2.6.35 and it does not hard hang, but suffered from a different
>>> problem with a perf API change.   The kgdb tests appear to loop and loop
>>> emitting endless streams of output in 2.6.35 and I already have that
>>> problem patched.
>>>       
>
> I keep getting the following stack trace which is different than your
> hang.  Is this looping I am seeing something with the NMI or kgdb?
>
>   

That was also a regression due to changes in the perf API for which I
have a patch pending.

I can send you the patch which Frederic has already tested OR you can
turn off CONFIG_DEBUG_RODATA in the kernel config, which is the source
of that particular problem.  

Thanks,
Jason.
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