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From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Date: Tue, 3 May 2011 10:25:52 +0900
Message-ID: <BANLkTikLNrQR6UVoAoUYfk7aAewKWcgAww@mail.gmail.com>
Subject: Re: [RFC][PATCH] mm: cut down __GFP_NORETRY page allocation failures
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To: Minchan Kim <minchan.kim@gmail.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>, Andrew Morton <akpm@linux-foundation.org>, Mel Gorman <mel@linux.vnet.ibm.com>, Dave Young <hidave.darkstar@gmail.com>, linux-mm <linux-mm@kvack.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>, Christoph Lameter <cl@linux.com>, Dave Chinner <david@fromorbit.com>, David Rientjes <rientjes@google.com>

2011/5/3 Minchan Kim <minchan.kim@gmail.com>:
> On Mon, May 2, 2011 at 7:14 PM, KOSAKI Motohiro
> <kosaki.motohiro@jp.fujitsu.com> wrote:
>>> On Mon, May 02, 2011 at 01:35:42AM +0900, Minchan Kim wrote:
>>>
>>> > Do you see my old patch? The patch want't incomplet but it's not bad =
for showing an idea.
>>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0=
 =A0^^^^^^^^^^^^^^^^
>>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 typo : wasn=
't complete
>>
>> I think your idea is eligible. Wu's approach may increase throughput but
>
> Yes. it doesn't change many subtle things and make much fair but the
> Wu's concern is order-0 pages with __GFP_NORETRY. By his experiment,
> my patch doesn't help much his concern.
> The problem I have is I don't have any infrastructure for reproducing
> his experiment. :(
>
>> may decrease latency. So, do you have a plan to finish the work?
>
> I want it but the day would be after finishing inorder-putback series. :)
> Maybe you have a environment(8core system). If you want it, go ahead. :)

Hahaha, no. I lost such ia64 box by physical crash. ;-)
I haven't reproduce his issue yet too.

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