linux-kernel - Re: [PATCH] [7/8] CPA: Don't flush caches on CPUs that support self-snoop

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Message-ID: <20080211070430.099fbded@laptopd505.fenrus.org>
Date:	Mon, 11 Feb 2008 07:04:30 -0800
From:	Arjan van de Ven <arjan@...radead.org>
To:	Andi Kleen <ak@...e.de>
Cc:	tglx@...utronix.de, mingo@...e.hu, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [7/8] CPA: Don't flush caches on CPUs that support
 self-snoop

On Mon, 11 Feb 2008 10:50:22 +0100 (CET)
Andi Kleen <ak@...e.de> wrote:

> 
> [2.6.25 candidate I believe]
> 
> The specification of SS in the public manuals is a little unclear,
> but I got confirmation from Intel that SS implies that there is no
> cache flush needed on caching attribute changes.

I'm hearing slightly different information, but am still chasing this one.
It might be better to delay this one to .26 ;-(
(I would very much like to avoid the cache flush but... it really HAS to be safe)


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