linux-kernel - Re: [RFC][PATCH 4/5] memory_pressure

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Message-Id: <20080115120012.0fcdd0f8.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Tue, 15 Jan 2008 12:00:12 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Marcelo Tosatti <marcelo@...ck.org>,
	Daniel Spang <daniel.spang@...il.com>,
	Rik van Riel <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC][PATCH 4/5] memory_pressure_notify() caller

On Tue, 15 Jan 2008 11:37:48 +0900
KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> wrote:

> Hi KAME, 
> 
> > > +	notify_threshold = (zone->pages_high +
> > > +			    zone->lowmem_reserve[MAX_NR_ZONES-1]) * 2;
> > > +
> > Why MAX_NR_ZONES-1 ?
> 
> this is intent to max lowmem_reserve.
> 
Ah, my point is.. how about this ?
==
if (page_zoneid(page) != ZONE_DMA)
	notify_threshold = zone->pages_high +
                   	zone->lowmem_reserve[page_zoneid(page) - 1] * 2;
==

Thanks,
-Kame

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