linux-kernel - RE: [RFC PATCH 0/4]: affinity-on-next-touch

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Message-id: <000001c9eac4$cb8b6690$62a233b0$@rwth-aachen.de>
Date:	Thu, 11 Jun 2009 20:45:29 +0200
From:	Stefan Lankes <lankes@...s.rwth-aachen.de>
To:	'Andi Kleen' <andi@...stfloor.org>
Cc:	linux-kernel@...r.kernel.org, Lee.Schermerhorn@...com,
	linux-numa@...r.kernel.org,
	Boris Bierbaum <boris@...s.rwth-aachen.de>,
	'Brice Goglin' <Brice.Goglin@...ia.fr>
Subject: RE: [RFC PATCH 0/4]: affinity-on-next-touch

> Your patches seem to have a lot of overlap with
> Lee Schermerhorn's old migrate memory on cpu migration patches.
> I don't know the status of those.

I analyze Lee Schermerhorn's migrate memory on cpu migration patches
(http://free.linux.hp.com/~lts/Patches/PageMigration/). I think that Lee
Schermerhorn add similar functionalities to the kernel. He called the
"affinity-on-next-touch" functionality "migrate_on_fault" and uses in his
patches the normal NUMA memory policies. Therefore, his solution fits better
to the Linux kernel. I tested his patches with our test applications and got
nearly the same performance results. 

I found only patches for the kernel 2.6.25-rc2-mm1. Does someone develop
these patches further?

Stefan

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