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Date: Wed, 2 Apr 2008 14:56:25 -0700 (PDT)
From: Christoph Lameter <clameter@sgi.com>
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Subject: Re: [patch 5/9] Convert anon_vma lock to rw_sem and refcount
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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.