linux-kernel - Re: [PATCH] perfctr: don't use CCCR_OVF

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Message-ID: <20080815115928.GD32726@elte.hu>
Date:	Fri, 15 Aug 2008 13:59:28 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Aristeu Rozanski <arozansk@...hat.com>
Cc:	linux-kernel@...r.kernel.org, jvillalovos@...hat.com
Subject: Re: [PATCH] perfctr: don't use CCCR_OVF_PMI1 on Pentium 4Ds


* Aristeu Rozanski <arozansk@...hat.com> wrote:

> Currently, setup_p4_watchdog() use CCCR_OVF_PMI1 to enable the counter 
> overflow interrupts to the second logical core. But this bit doesn't 
> work on Pentium 4 Ds (model 4, stepping 4) and this patch avoids its 
> use on these processors. [...]

btw., what was the effect - an oops on bootup, or a non-working 
watchdog?

> [...] Tested on 4 different machines that have this specific model 
> with success.
> 
> Signed-off-by: Aristeu Rozanski <aris@...hat.com>

applied to tip/x86/urgent - thanks Aristeu.

	Ingo
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