linux-kernel - Re: [patch 5/9] Convert anon_vma lock to rw

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Message-ID: <Pine.LNX.4.64.0804021455180.31247@schroedinger.engr.sgi.com>
Date:	Wed, 2 Apr 2008 14:56:25 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Andrea Arcangeli <andrea@...ranet.com>
cc:	Hugh Dickins <hugh@...itas.com>, 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>, steiner@....com,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	daniel.blueman@...drics.com
Subject: Re: [patch 5/9] Convert anon_vma lock to rw_sem and refcount

On Wed, 2 Apr 2008, Andrea Arcangeli wrote:

> paging), hence the slowdown. What you benchmarked is the write side,
> which is also the fast path when the system is heavily CPU bound. I've
> to say aim is a great benchmark to test this regression.

I am a bit surprised that brk performance is that important. There may be 
other measurement that have to be made to assess how this would impact a 
real load.



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