linux-kernel - Re: [ck] Re: -mm merge plans for 2.6.23

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Message-ID: <46A6EE09.1030307@yahoo.com.au>
Date:	Wed, 25 Jul 2007 16:30:33 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Matthew Hawkins <darthmdh@...il.com>
CC:	Eric St-Laurent <ericstl34@...patico.ca>,
	Ray Lee <ray-lk@...rabbit.org>,
	Jesper Juhl <jesper.juhl@...il.com>,
	linux-kernel@...r.kernel.org, ck list <ck@....kolivas.org>,
	linux-mm@...ck.org, Paul Jackson <pj@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rene Herman <rene.herman@...il.com>
Subject: Re: [ck] Re: -mm merge plans for 2.6.23

Matthew Hawkins wrote:
> On 7/25/07, Nick Piggin <nickpiggin@...oo.com.au> wrote:
> 
>> Not to say that neither fix some problems, but for such conceptually
>> big changes, it should take a little more effort than a constructed test
>> case and no consideration of the alternatives to get it merged.
> 
> 
> Swap Prefetch has existed since September 5, 2005.  Please Nick,
> enlighten us all with your "alternatives" which have been offered (in
> practical, not theoretical form) in the past 23 months, along with
> their non-constructed benchmarks proving their case and the hordes of
> happy users and kernel developers who have tested them out the wazoo
> and given their backing.  Or just take a nice steaming jug of STFU.

The alternatives comment was in relation to the readahead based drop
behind patch,for which an alternative would be improving use-once,
possibly in the way I described.

As for swap prefetch, I don't know, I'm not in charge of it being
merged or not merged. I do know some people have reported that their
updatedb problem gets much better with swap prefetch turned on, and
I am trying to work on that too.

For you? You also have the alternative to help improve things yourself,
and you can modify your own kernel.

-- 
SUSE Labs, Novell Inc.
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