linux-kernel - Re: [PATCH -v3] perf, x86: try to handle unknown nmis with running perfctrs

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Date:	Tue, 24 Aug 2010 22:54:58 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Don Zickus <dzickus@...hat.com>
Cc:	Robert Richter <robert.richter@....com>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>,
	Lin Ming <ming.m.lin@...el.com>,
	"fweisbec@...il.com" <fweisbec@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Huang, Ying" <ying.huang@...el.com>,
	Yinghai Lu <yinghai@...nel.org>,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH -v3] perf, x86: try to handle unknown nmis with running
	perfctrs

On Tue, Aug 24, 2010 at 02:46:58PM -0400, Don Zickus wrote:
> On Tue, Aug 24, 2010 at 09:28:06PM +0400, Cyrill Gorcunov wrote:
> > On Tue, Aug 24, 2010 at 07:15:05PM +0200, Robert Richter wrote:
> > > On 23.08.10 04:53:39, Ingo Molnar wrote:
> > > > Ok, to not hold up the perf/urgent flow i zapped these two commits for 
> > > > the time being:
> > > > 
> > > >  4a31beb: perf, x86: Fix handle_irq return values
> > > >  8e3e42b: perf, x86: Try to handle unknown nmis with an enabled PMU
> > > 
> > > Ingo, are those commits in some branch to fetch them for testing? I
> > > did not find them in tip/master.
> > > 
> > > Thanks,
> > > 
> > > -Robert
> > > 
> > > -- 
> > > Advanced Micro Devices, Inc.
> > > Operating System Research Center
> > >
> > 
> > Robert, they should be in -tip tree, I have
> > 
> > | commit 4a31bebe71ab2e4f6ecd6e5f9f2ac9f0ff38ff76
> > | Author: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> > | Date:   Thu Aug 19 16:28:00 2010 +0200
> > |
> > |    perf, x86: Fix handle_irq return values
> 
> Has anyone else seen kernel panics when enabling the LOCKUP_DETECTOR or
> apply Robert's patch?  I keep getting a panic with unable to handle paging
> request everytime either Robert's patch or the lockup detector uses
> __get_cpu_var().  And only on 2.6.36 code.
> 
> Cheers,
> Don
> 

I use 2.6.34 atm. Letme try 2.6.36 (which might require some time to recompile).

	-- Cyrill
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