linux-kernel - Re: [PATCH v3] mm: make expand_downwards symmetrical to expand

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Message-ID: <1303411537.9048.3583.camel@nimitz>
Date:	Thu, 21 Apr 2011 11:45:37 -0700
From:	Dave Hansen <dave@...ux.vnet.ibm.com>
To:	Christoph Lameter <cl@...ux.com>
Cc:	James Bottomley <James.Bottomley@...senPartnership.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	David Rientjes <rientjes@...gle.com>,
	Pekka Enberg <penberg@...nel.org>,
	Michal Hocko <mhocko@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Hugh Dickins <hughd@...gle.com>, linux-mm@...ck.org,
	LKML <linux-kernel@...r.kernel.org>,
	linux-parisc@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	x86 maintainers <x86@...nel.org>, Tejun Heo <tj@...nel.org>,
	Mel Gorman <mel@....ul.ie>
Subject: Re: [PATCH v3] mm: make expand_downwards symmetrical to
 expand_upwards

On Thu, 2011-04-21 at 13:33 -0500, Christoph Lameter wrote:
> http://www.linux-mips.org/archives/linux-mips/2008-08/msg00154.html
> 
> http://mytechkorner.blogspot.com/2010/12/sparsemem.html
> 
> Dave Hansen, Mel: Can you provide us with some help? (Its Easter and so
> the europeans may be off for awhile) 

Yup, for sure.  It's also interesting how much code ppc64 removed when
they did this:

http://lists.ozlabs.org/pipermail/linuxppc64-dev/2005-November/006646.html

Please cc me on patches.  Or, if nobody else was planning on doing it, I
can take a stab at doing SPARSEMEM on one of the arches.  I won't be
able to _run_ it outside of qemu, but it might be quicker than someone
starting from scratch.

Was it really just m68k and parisc that need immediate attention?

-- Dave

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