Re: [PATCH -v2] perf, x86: try to handle unknown nmis with runningperfctrs
From: Robert Richter
Date: Mon Aug 16 2010 - 18:56:48 EST
On 16.08.10 15:06:59, Cyrill Gorcunov wrote:
> I suspect Peter was supposed to be in To: field ;)
It was the attempt to answer 2 mails with one. :)
> Robert, I think we still may miss unknown irq, consider the case when
> unknown nmi is latched while you handle nmi from perf and what is
> more interesting several counters may be overflowed. So you set
> delta small enough and second (unknown nmi) will be in range and
> treated as being perf back-to-back, or I miss something from patch?
Yes, that's true, but before you have to enable your Infinite
Improbability Drive.
-Robert
--
Advanced Micro Devices, Inc.
Operating System Research Center
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