linux-kernel - Re: [PATCH] drop unneeded variable in amd_apic_timer

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Date:	Wed, 8 Aug 2007 12:00:31 -0400 (EDT)
From:	Cal Peake <cp@...olutedigital.net>
To:	Andi Kleen <ak@...e.de>
cc:	Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drop unneeded variable in amd_apic_timer_broken

On Wed, 8 Aug 2007, Andi Kleen wrote:

> Can you please test if this patch works?

Yep, seems to do the trick. Thanks!

> BTW I checked with AMD and they seem to think it's just a buggy BIOS.

Nod. Atleast we can work around it.

> Use global flag to disable broken local apic timer on AMD CPUs.
> 
> The Averatec 2370 laptop BIOS seems to program the ENABLE_C1E

s~2370~2370/2371~ to be completely accurate ;)

> MSR inconsistently between cores. This confuses the lapic
> use heuristics wants to know if C1E is enabled anywhere.
> 
> Use a global flag instead of a per cpu flag to handle this.
> If any CPU has C1E enabled disabled lapic use.
> 
> Thanks to Cal Peake for debugging.
> Signed-off-by: Andi Kleen <ak@...e.de>

Acked-by: Cal Peake <cp@...olutedigital.net>

-- 
Cal Peake


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