linux-kernel - Re: -mm merge plans for 2.6.23

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Date:	Thu, 26 Jul 2007 16:17:30 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Ray Lee <ray-lk@...rabbit.org>,
	Eric St-Laurent <ericstl34@...patico.ca>,
	Rene Herman <rene.herman@...il.com>,
	Jesper Juhl <jesper.juhl@...il.com>,
	ck list <ck@....kolivas.org>, Ingo Molnar <mingo@...e.hu>,
	Paul Jackson <pj@....com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: -mm merge plans for 2.6.23

Andrew Morton wrote:
> On Thu, 26 Jul 2007 15:53:37 +1000 Nick Piggin <nickpiggin@...oo.com.au> wrote:
> 
> 
>>Not that I want to say anything about swap prefetch getting merged: my
>>inbox is already full of enough "helpful suggestions" about that,
> 
> 
> give them the kernel interfaces, they can do it themselves ;)

It is a good idea if we can give enough to get started. Then if
they run into something they really need to do in the kernel, we
can take a look.

Page eviction order / prefetch-back-in-order might be tricky to
expose.


>>so I'll
>>just be happy to have a look at little things like updatedb.
> 
> 
> Yes, that is a little thing.  I mean, even if the kernel's behaviour
> during an updatedb run was "perfect" (ie: does what we the designers
> curently intend it to do (whatever that is)) then the core problem isn't
> solved: short-term workload evicts your working set and you have to
> synchronously reestablish it.

Sure, I know and I was never against swap (and/or file) prefetching to
solve this problem. I'm just saying, I'm staying out of that :)

-- 
SUSE Labs, Novell Inc.
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