Re: [PATCH -tip/master] perf, x86: P4 PMU - Fix unflagged overflowshandling v4

From: Don Zickus
Date: Fri Jan 07 2011 - 14:11:23 EST

On Fri, Jan 07, 2011 at 09:42:06PM +0300, Cyrill Gorcunov wrote:
> Don found that P4 PMU reads CCCR register instead of counter
> itself (in attempt to catch unflagged event) this makes P4
> NMI handler to consume all NMIs it observes. So the other
> NMI users such as kgdb simply have no chance to get NMI
> on their hands.

Acked-by: Don Zickus <dzickus@xxxxxxxxxx>
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