linux-kernel - Re: [RFC][PATCH 0/3] big chunk memory allocator v2

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Message-ID: <20101029103154.GA10823@gargoyle.fritz.box>
Date:	Fri, 29 Oct 2010 12:31:54 +0200
From:	Andi Kleen <andi.kleen@...el.com>
To:	Michał Nazarewicz <m.nazarewicz@...sung.com>
Cc:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Minchan Kim <minchan.kim@...il.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	"fujita.tomonori@....ntt.co.jp" <fujita.tomonori@....ntt.co.jp>,
	"felipe.contreras@...il.com" <felipe.contreras@...il.com>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	Jonathan Corbet <corbet@....net>,
	Russell King <linux@....linux.org.uk>,
	Pawel Osciak <pawel@...iak.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [RFC][PATCH 0/3] big chunk memory allocator v2

> When I was posting CMA, it had been suggested to create a new migration type
> dedicated to contiguous allocations.  I think I already did that and thanks to
> this new migration type we have (i) an area of memory that only accepts movable
> and reclaimable pages and 

Aka highmem next generation :-(

> (ii) is used only if all other (non-reserved) pages have
> been allocated.

That will be near always the case after some uptime, as memory fills up
with caches. Unless you do early reclaim? 

-Andi

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