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

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Date:	Thu, 26 Aug 2010 13:18:29 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Robert Richter <robert.richter@....com>
Cc:	Don Zickus <dzickus@...hat.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 Thu, Aug 26, 2010 at 1:00 PM, Robert Richter <robert.richter@....com> wrote:
...
>
> This could also be a race in the counter handling code, or we do not
> proper count the number of handled counters. Maybe 2 counters actually
> fired but we only noticed one counter and then accidentially cleared
> the 2nd without processing it.
>
> -Robert
>

Any chance to get it tested on P4 machine since it has a bit
different design?

Cyrill
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