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Date: Wed, 1 Dec 2004 16:55:38 -0800
From: Andrew Morton <akpm@osdl.org>
To: Linus Torvalds <torvalds@osdl.org>
Cc: clameter@sgi.com, hugh@veritas.com, benh@kernel.crashing.org,
       nickpiggin@yahoo.com.au, linux-mm@kvack.org, linux-ia64@vger.kernel.org,
       linux-kernel@vger.kernel.org
Subject: Re: page fault scalability patch V12 [0/7]: Overview and
 performance tests
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Linus Torvalds <torvalds@osdl.org> wrote:
>
> 
> 
> On Wed, 1 Dec 2004, Christoph Lameter wrote:
> >
> > Changes from V11->V12 of this patch:
> > - dump sloppy_rss in favor of list_rss (Linus' proposal)
> > - keep up against current Linus tree (patch is based on 2.6.10-rc2-bk14)
> > 
> > This is a series of patches that increases the scalability of
> > the page fault handler for SMP. Here are some performance results
> > on a machine with 512 processors allocating 32 GB with an increasing
> > number of threads (that are assigned a processor each).
> 
> Ok, consider me convinced. I don't want to apply this before I get 2.6.10 
> out the door, but I'm happy with it.

There were concerns about some architectures relying upon page_table_lock
for exclusivity within their own pte handling functions.  Have they all
been resolved?

> I assume Andrew has already picked up the previous version.

Nope.  It has major clashes with the 4-level-pagetable work.