linux-kernel - Re: [RFC] perf, x86: Segregate PMU workaraunds into x86_pmu_quirk

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Message-ID: <20100601212556.GD14072@lenovo>
Date:	Wed, 2 Jun 2010 01:25:56 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Peter Zijlstra <peterz@...radead.org>,
	Robert Richter <robert.richter@....com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [RFC] perf, x86: Segregate PMU workaraunds into
	x86_pmu_quirk_ops structure

On Mon, May 31, 2010 at 08:45:53PM +0400, Cyrill Gorcunov wrote:
...
> 
> So I guess plain test may be more-less fine here, hmm?
> 
> 	-- Cyrill
> ---
> perf, x86: Make a second write to performance counter when needed
> 
> On Netburst cpu we need a second write to performance counter to
> be sure it's updated properly.
> 
> Signed-off-by: Cyrill Gorcunov <gorcunov@...nvz.org>
> ---
>  arch/x86/kernel/cpu/perf_event.c    |   10 ++++++++++
>  arch/x86/kernel/cpu/perf_event_p4.c |    9 +++++++++
>  2 files changed, 19 insertions(+)
> 
...

Ping? Any objections/ideas on this approach?

	-- Cyrill
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