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

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Date:	Thu, 18 Nov 2010 09:05:16 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Jason Wessel <jason.wessel@...driver.com>
Cc:	Don Zickus <dzickus@...hat.com>,
	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


* Jason Wessel <jason.wessel@...driver.com> wrote:

> 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.  

Would be nice to know that Don's series does not introduce a regression for kgdb 
before i can apply the patches.

Thanks,

	Ingo
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