linux-kernel - Re: [PATCH -tip] perf, x86: P4 PMU - Don't forget to clear cpuc->active

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Message-ID: <20110421131748.GB1642@elte.hu>
Date:	Thu, 21 Apr 2011 15:17:48 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Don Zickus <dzickus@...hat.com>
Cc:	Cyrill Gorcunov <gorcunov@...nvz.org>,
	Lin Ming <ming.m.lin@...el.com>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -tip] perf, x86: P4 PMU - Don't forget to clear
 cpuc->active_mask on overflow


* Don Zickus <dzickus@...hat.com> wrote:

> On Wed, Apr 20, 2011 at 07:13:37PM +0400, Cyrill Gorcunov wrote:
> > It's not enough to simply disable event on overflow the cpuc->active_mask
> > should be cleared as well otherwise counter may stall in "active" even
> > in real being already disabled (which potentially may lead to the situation
> > that user may not use this counter further).
> 
> I also noticed this patch fixed some unknown NMIs on a P4 when I stressed
> the box
> 
> Acked-by: Don Zickus <dzickus@...hat.com>

Ok. Mind one of you resending all pending patches in this area, with all 
Acked-by's and Tested-by's in place?

I'd like to ask one more thing as well: please submit the patches in a single 
e-mail thread - i.e. with a proper 0/N and e-mail threading, so that anyone can 
see that they are a group of patches. Current submissions are various versions 
of patches with no clear grouping.

Thanks,

	Ingo
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