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

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Date:	Tue, 3 May 2011 09:53:58 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.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

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. :)

Thanks, KOSAKI.


-- 
Kind regards,
Minchan Kim
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