linux-kernel - Re: RFT: updatedb "morning after" problem [was: Re: -mm merge plans for 2.6.23]

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Message-ID: <46ACAB45.6080307@gmail.com>
Date:	Sun, 29 Jul 2007 16:59:17 +0200
From:	Rene Herman <rene.herman@...il.com>
To:	Ray Lee <ray-lk@...rabbit.org>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>, david@...g.hm,
	Daniel Hazelton <dhazelton@...er.net>,
	Mike Galbraith <efault@....de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Frank Kingswood <frank@...gswood-consulting.co.uk>,
	Andi Kleen <andi@...stfloor.org>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Jesper Juhl <jesper.juhl@...il.com>,
	ck list <ck@....kolivas.org>, Paul Jackson <pj@....com>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: RFT: updatedb "morning after" problem [was: Re: -mm merge plans
 for 2.6.23]

On 07/29/2007 04:58 PM, Ray Lee wrote:

> On 7/29/07, Rene Herman <rene.herman@...il.com> wrote:
>> On 07/29/2007 03:12 PM, Alan Cox wrote:

>>> More radically if anyone wants to do real researchy type work - how about
>>> log structured swap with a cleaner  ?

>> Right over my head. Why does log-structure help anything?
> 
> Log structured disk layouts allow for better placement of writeout, so
> that you cn eliminate most or all seeks. Seeks are the enemy when
> trying to get full disk bandwidth.
> 
> google on log structured disk layout, or somesuch, for details.

I understand what log structure is generally, but how does it help swapin?

Rene.
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