From: Minchan Kim <minchan.kim@gmail.com>
To: TAO HU <tghk48@motorola.com>
Cc: linux-mm@kvack.org, linux-input@vger.kernel.org,
Christoph Lameter <cl@linux-foundation.org>,
Pekka Enberg <penberg@cs.helsinki.fi>,
Matt Mackall <mpm@selenic.com>
Subject: Re: [HELP] OOM:Page allocation fragment issue
Date: Wed, 20 Apr 2011 14:49:23 +0900 [thread overview]
Message-ID: <BANLkTimLmOfCruREX8-FW-JVOgmXXbbfWg@mail.gmail.com> (raw)
In-Reply-To: <BANLkTinCq22_JckA9XfOjYh3pozUWW1V1Q@mail.gmail.com>
On Wed, Apr 20, 2011 at 2:40 PM, TAO HU <tghk48@motorola.com> wrote:
> Hi, Minchan Kim
>
> Thanks for your analysis and suggestion!
>
> I'm not familiar with COMPACTION.
It's rather recent new feature of mm.
> Does it work with ARM?
Logically, It doesn't depends on architecture.
But I am not sure because ARM's ugly pfn_valid hole in sparsemem.
(I don't remember it well but there was some issue at that time)
I guess if you use FLATMEM, it works well.
If you have a trouble, please report it.
> Does it require specific MMU configuration? Notice that it depends on
> HUGETLB_PAGE
>
It doesn't depends on hugetlb. It is fixed [33a938774fdb: mm:
compaction: don't depend on HUGETLB_PAGE] recently. You can backport
it.
Thanks.
--
Kind regards,
Minchan Kim
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next prev parent reply other threads:[~2011-04-20 5:49 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-20 2:59 TAO HU
2011-04-20 4:47 ` Minchan Kim
2011-04-20 5:40 ` TAO HU
2011-04-20 5:49 ` Minchan Kim [this message]
2011-04-20 5:53 ` Minchan Kim
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