linux-kernel - Re: [PATCH -tip, final] perf, x86: Add hw_watchdog_set

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Message-ID: <20110708131218.GE23657@sun>
Date:	Fri, 8 Jul 2011 17:12:18 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Don Zickus <dzickus@...hat.com>,
	Stephane Eranian <eranian@...gle.com>,
	Lin Ming <ming.m.lin@...el.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -tip, final] perf, x86: Add hw_watchdog_set_attr() in a
 sake of nmi-watchdog on P4

On Fri, Jul 08, 2011 at 05:01:47PM +0400, Cyrill Gorcunov wrote:
...
> 
> Changing cpu-cycles to bus cycles will allow nmi-watchdog and
> perf top co-exsist but it means perf bus-cycles won't work anymore

oops, I forgot that they both using MSR_P4_FSB_ESCR0/1, so no, they won't work
together (ie nmi-watchdog and perf top won't work simultaneously). So lets
wait for test results, I hope they pass well and we finally isolate all this
crap inside p4 pmu code leaving all code around untouched ;)

> with active nmi-watchdog. So I think events aliases (again, if it
> work :) will be better for us, right?
> 

	Cyrill
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