On Thu 04-10-12 14:11:36, David Miller wrote:

From: Andrea Arcangeli <redacted>
Date: Thu, 4 Oct 2012 12:35:48 +0200

quoted

Hi Dave,

On Wed, Oct 03, 2012 at 10:00:27PM -0400, David Miller wrote:

quoted

From: Andrew Morton <akpm@linux-foundation.org>
Date: Tue, 2 Oct 2012 15:55:44 -0700

quoted

I had a shot at integrating all this onto the pending stuff in linux-next. 
"mm: Add and use update_mmu_cache_pmd() in transparent huge page code."
needed minor massaging in huge_memory.c.  But as Andrea mentioned, we
ran aground on Gerald's
http://ozlabs.org/~akpm/mmotm/broken-out/thp-remove-assumptions-on-pgtable_t-type.patch,
part of the thp-for-s390 work.

While working on a rebase relative to this work, I noticed that the
s390 patches don't even compile.

It's because of that pmd_pgprot() change from Peter Z. which arrives
asynchonously via the linux-next tree.  It makes THP start using
pmd_pgprot() (a new interface) which the s390 patches don't provide.

My suggestion would be to ignore linux-next and port it to -mm only
and re-send to Andrew. schednuma is by mistake in linux-next, and
it's not going to get merged as far as I can tell.

Sorry Andrea, that simply is impractical.

The first thing Andrew's patch series does is include linux-next,
therefore every THP and MM patch in his series is against linux-next.

FWIW there is also a pure -mm (non-rebased) git tree at
http://git.kernel.org/?p=linux/kernel/git/mhocko/mm.git;a=summary
since-3.6 branch. It is based on top of 3.6 with mm patches from
Andrew's tree.

HTH
-- 
Michal Hocko
SUSE Labs

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