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Date: Fri, 04 Oct 2002 12:15:06 -0700
From: Andrew Morton <akpm@digeo.com>
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To: "Martin J. Bligh" <mbligh@aracnet.com>
CC: Manfred Spraul <manfred@colorfullife.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] patch-slab-split-03-tail
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"Martin J. Bligh" wrote:
> 
> > Run that by me again?  So we're saying "if we just freed an
> > object from this page then make this page be the *last* page
> > which is eligible for new allocations"?  Under the assumption
> > that other objects in that same page are about to be freed
> > up as well?
> >
> > Makes sense.  It would be nice to get this confirmed in
> > targetted testing ;)
> 
> Just doing my normal boring kernel compile suggest Manfred's
> last big rollup performs exactly the same as without it. Not
> sure if that's any help or not ....
> 

Well.  This patch is supposed to decrease internal fragmentation.
We need to prove that theory.  An appropriate test would be:

- boot with `mem=48m'
- untar kernel
- build kernel
- capture /proc/slabinfo

- apply patch

- repeat

- compare and explain.

I know what your reboot times are like ;)  I'll do it.
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