linux-kernel - Re: [PATCH 02/40] x86: mm: drop TLB flush from ptep_set_access

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Message-ID: <20121122205637.4e9112e2@pyramind.ukuu.org.uk>
Date:	Thu, 22 Nov 2012 20:56:37 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Ingo Molnar <mingo@...nel.org>, Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Hugh Dickins <hughd@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Paul Turner <pjt@...gle.com>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	Alex Shi <lkml.alex@...il.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Aneesh Kumar <aneesh.kumar@...ux.vnet.ibm.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 02/40] x86: mm: drop TLB flush from
 ptep_set_access_flags

On Thu, 22 Nov 2012 19:25:15 +0000
Mel Gorman <mgorman@...e.de> wrote:

> From: Rik van Riel <riel@...hat.com>
> 
> 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 ?

Alan
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