linux-kernel - Re: [PATCH] Regard MSRs in lapic_suspend()/lapic

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Message-ID: <20061118070310.GD32226@elte.hu>
Date:	Sat, 18 Nov 2006 08:03:10 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Karsten Wiese <fzu@...gehoertderstaat.de>
Cc:	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	Stephen Hemminger <shemminger@...l.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [PATCH] Regard MSRs in lapic_suspend()/lapic_resume()


* Karsten Wiese <fzu@...gehoertderstaat.de> wrote:

> Read/Write APIC_LVTPC and APIC_LVTTHMR only, if get_maxlvt() returns 
> certain values. This is done like everywhere else in 
> i386/kernel/apic.c, so I guess its correct. Suspends/Resumes to disk 
> fine and eleminates an smp_error_interrupt() here on a K8.
> 
> Signed-off-by: Karsten Wiese <fzu@...gehoertderstaat.de>

nice one! I'm tempted to suggest this for 2.6.19 merge because it causes 
the kernel to do less (so it has little risk of breaking something that 
is working) ... who knows what happens on certain (older?) APICs when we 
try to write back those bogus values.

  Acked-by: Ingo Molnar <mingo@...e.hu>

	Ingo
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