linux-kernel - Re: memory resource accounting (was Re: [RFC, PATCH 0/5] Going forward with Resource Management

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Message-Id: <200608090806.04615.ak@suse.de>
Date:	Wed, 9 Aug 2006 08:06:04 +0200
From:	Andi Kleen <ak@...e.de>
To:	"Magnus Damm" <magnus.damm@...il.com>
Cc:	"Nick Piggin" <nickpiggin@...oo.com.au>, rohitseth@...gle.com,
	"Dave Hansen" <haveblue@...ibm.com>, "Kirill Korotaev" <dev@...ru>,
	vatsa@...ibm.com, "Alan Cox" <alan@...rguk.ukuu.org.uk>,
	"Andrew Morton" <akpm@...l.org>, mingo@...e.hu, sam@...ain.net,
	linux-kernel@...r.kernel.org, dev@...nvz.org, efault@....de,
	balbir@...ibm.com, sekharan@...ibm.com, nagar@...son.ibm.com,
	pj@....com, "Andrey Savochkin" <saw@...ru>
Subject: Re: memory resource accounting (was Re: [RFC, PATCH 0/5] Going forward with Resource Management - A cpu controller)

 
> I've been thinking a bit about replacing the mapping and index members
> in struct page with a single pointer that point into a cluster data
> type. The cluster data type is aligned to a power of two and contains
> a header that is shared between all pages within the cluster. The
> header contains a base index and mapping. The rest of the cluster is
> an array of pfn:s that point back to the actual page.

Nice. While the code would probably do more references i bet
it would be faster overall because it would have less cache footprint.

But doing it would be a *lot* of editing work all over file systems/VM/etc.

-Andi
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