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Message-ID: <3b0ffc1f0602170653o2062b2b1i71832c7869455426@mail.gmail.com>
Date: Fri, 17 Feb 2006 09:53:09 -0500
From: Kevin Radloff <radsaq@gmail.com>
To: Con Kolivas <kernel@kolivas.org>
Subject: Re: [ck] [PATCH] mm: implement swap prefetching (v26)
Cc: Andrew Morton <akpm@osdl.org>, ck list <ck@vds.kolivas.org>,
       linux kernel mailing list <linux-kernel@vger.kernel.org>,
       Bart Samwel <bart@samwel.tk>
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On 2/17/06, Con Kolivas <kernel@kolivas.org> wrote:
> The discussion was about what size to make the swap prefetching. Since the
> size is not user tunable any more that is not the case. I had an offlist
> discussion with Bart Samwel about it and basically if your drive spins down
> at 5 seconds (which is what commonly happens with laptop mode) you will never
> have an opportunity to prefetch. This means swap prefetch will basically
> always spin up the drive nullifying laptop mode. On balance if you care about
> power more than anything to actually set laptop mode I suspect you wont want
> prefetch using any more power.

Ahh, that's certainly a valid point. Although, it could be said that
since the laptop mode script allows you to set a great number of thing
is a great number of ways to achieve your vision of low power mode,
the effectiveness may actually vary. But I don't comprehend your
definition of "idle" in the patch anyway, so I won't bother even
trying to discuss it. ;)

--
Kevin 'radsaq' Radloff
radsaq@gmail.com
http://thesaq.com/
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