linux-kernel - Re: [PATCH] mmu notifiers #v7

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Message-ID: <Pine.LNX.4.64.0802281711240.2670@schroedinger.engr.sgi.com>
Date:	Thu, 28 Feb 2008 17:13:02 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	Jack Steiner <steiner@....com>
cc:	Andrea Arcangeli <andrea@...ranet.com>,
	Nick Piggin <npiggin@...e.de>, akpm@...ux-foundation.org,
	Robin Holt <holt@....com>, Avi Kivity <avi@...ranet.com>,
	Izik Eidus <izike@...ranet.com>,
	kvm-devel@...ts.sourceforge.net,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	general@...ts.openfabrics.org,
	Steve Wise <swise@...ngridcomputing.com>,
	Roland Dreier <rdreier@...co.com>,
	Kanoj Sarcar <kanojsarcar@...oo.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	daniel.blueman@...drics.com
Subject: Re: [PATCH] mmu notifiers #v7

On Fri, 29 Feb 2008, Andrea Arcangeli wrote:

> On Thu, Feb 28, 2008 at 05:17:33PM -0600, Jack Steiner wrote:
> > I disagree. The location of the callout IS a performance issue. In simple
> > comparisons of the 2 patches (Christoph's vs. Andrea's), Andrea's has a 7X
> > increase in the number of TLB purges being issued to the GRU. TLB flushing
> 
> Are you sure that you're referring to #v7?

Jack: AFAICT Andrea moved the release callout and things will be 
fine in the next release.

 
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