linux-kernel - Re: [RFC][PATCH] mm: cut down __GFP

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

2011/5/3 Minchan Kim <minchan.kim@...il.com>:
> On Mon, May 2, 2011 at 7:14 PM, KOSAKI Motohiro
> <kosaki.motohiro@...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.
>>>                                      ^^^^^^^^^^^^^^^^
>>>                               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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