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From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: kosaki.motohiro@jp.fujitsu.com, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org, Marcelo Tosatti <marcelo@kvack.org>,
	Rik van Riel <riel@redhat.com>,
	Daniel Spang <daniel.spang@gmail.com>
Subject: Re: [RFC][PATCH] a bit improvement of ZONE_DMA page reclaim
Date: Fri, 18 Jan 2008 20:11:22 +0900	[thread overview]
Message-ID: <20080118200423.8FBC.KOSAKI.MOTOHIRO@jp.fujitsu.com> (raw)
In-Reply-To: <20080118162434.8FB1.KOSAKI.MOTOHIRO@jp.fujitsu.com>

Hi Andrew,

> > > on X86, ZONE_DMA is very very small.
> > > It is often no used at all. 
> > 
> > In that case page-reclaim is supposed to set all_unreclaimable and
> > basically ignores the zone altogether until it looks like something might
> > have changed.
> > 
> > Is that code not working?  (quite possible).
> 
> please insert blow debug printk and dd if=bigfile of=/dev/null.
> you see "near_oom(DMA) 0 0 0" messages :)

sorry, my last mail is not enough description.
It is not so useful at solo use. 
As you say, If long time passes all_unreclaimable turn on and 
incorrect shrink list become no happned.

but, my mem_notify patch very dislike incorrect shrink ;-)

result as, I don't hope quick merge.
and I will merge to my mem_notify patch series.

Thanks.


- kosaki



WARNING: multiple messages have this Message-ID (diff)
From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: kosaki.motohiro@jp.fujitsu.com, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org, Marcelo Tosatti <marcelo@kvack.org>,
	Rik van Riel <riel@redhat.com>,
	Daniel Spang <daniel.spang@gmail.com>
Subject: Re: [RFC][PATCH] a bit improvement of ZONE_DMA page reclaim
Date: Fri, 18 Jan 2008 20:11:22 +0900	[thread overview]
Message-ID: <20080118200423.8FBC.KOSAKI.MOTOHIRO@jp.fujitsu.com> (raw)
In-Reply-To: <20080118162434.8FB1.KOSAKI.MOTOHIRO@jp.fujitsu.com>

Hi Andrew,

> > > on X86, ZONE_DMA is very very small.
> > > It is often no used at all. 
> > 
> > In that case page-reclaim is supposed to set all_unreclaimable and
> > basically ignores the zone altogether until it looks like something might
> > have changed.
> > 
> > Is that code not working?  (quite possible).
> 
> please insert blow debug printk and dd if=bigfile of=/dev/null.
> you see "near_oom(DMA) 0 0 0" messages :)

sorry, my last mail is not enough description.
It is not so useful at solo use. 
As you say, If long time passes all_unreclaimable turn on and 
incorrect shrink list become no happned.

but, my mem_notify patch very dislike incorrect shrink ;-)

result as, I don't hope quick merge.
and I will merge to my mem_notify patch series.

Thanks.


- kosaki


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  reply	other threads:[~2008-01-18 11:11 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-18  6:34 [RFC][PATCH] a bit improvement of ZONE_DMA page reclaim KOSAKI Motohiro
2008-01-18  6:34 ` KOSAKI Motohiro
2008-01-18  7:21 ` Andrew Morton
2008-01-18  7:21   ` Andrew Morton
2008-01-18  7:28   ` KOSAKI Motohiro
2008-01-18  7:28     ` KOSAKI Motohiro
2008-01-18 11:11     ` KOSAKI Motohiro [this message]
2008-01-18 11:11       ` KOSAKI Motohiro

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