Re: [PATCH 02/40] x86: mm: drop TLB flush from ptep_set_access_flags

[Mel Gorman]

On Thu, Nov 22, 2012 at 08:56:37PM +0000, Alan Cox wrote:
> On Thu, 22 Nov 2012 19:25:15 +0000
> Mel Gorman <mgorman@xxxxxxx> wrote:
> 
> > From: Rik van Riel <riel@xxxxxxxxxx>
> > 
> > Intel has an architectural guarantee that the TLB entry causing
> > a page fault gets invalidated automatically. This means
> > we should be able to drop the local TLB invalidation.
> 
> Can we get an AMD sign off on that ?
> 

Hi Alan,

You sortof can[1]. Borislav Petkov answered that they do
https://lkml.org/lkml/2012/11/17/85 and quoted the manual at
https://lkml.org/lkml/2012/10/29/414 saying that this should be ok.

[1] There is no delicate way of putting it. I've no idea what the
    current status of current and former AMD kernel developers is.

-- 
Mel Gorman
SUSE Labs
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