linux-kernel - Re: [PATCH] x86, AMD: Correct F15h IC aliasing issue

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Message-ID: <4E303579.4000903@redhat.com>
Date:	Wed, 27 Jul 2011 18:57:45 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Borislav Petkov <bp@...64.org>
CC:	Ingo Molnar <mingo@...e.hu>,
	"Przywara, Andre" <Andre.Przywara@....com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	"Pohlack, Martin" <Martin.Pohlack@....com>
Subject: Re: [PATCH] x86, AMD: Correct F15h IC aliasing issue

On 07/27/2011 06:49 PM, Borislav Petkov wrote:
> On Wed, Jul 27, 2011 at 11:45:00AM -0400, Avi Kivity wrote:
> >  What about F21h processors?  I see you're not checking them.
> >
> >  Is there any reason the check should not be made based on topology?
>
> Because this patch addresses a performance improvement for the F15h
> microarchitecture - that doesn't have anything to do with cache
> topology.

Okay.

Out of curiosity, what's the performance impact if the workaround is not 
enabled?

-- 
error compiling committee.c: too many arguments to function

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