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From: Daniel Phillips <phillips@bonn-fries.net>
To: Rik van Riel <riel@conectiva.com.br>
Subject: Re: spindown [was Re: 2.4.6-pre2, pre3 VM Behavior]
Date: Sat, 16 Jun 2001 23:44:57 +0200
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Cc: Pavel Machek <pavel@suse.cz>, John Stoffel <stoffel@casc.com>,
        Roger Larsson <roger.larsson@norran.net>,
        Linux-Kernel <linux-kernel@vger.kernel.org>
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On Saturday 16 June 2001 23:06, Rik van Riel wrote:
> On Sat, 16 Jun 2001, Daniel Phillips wrote:
> > As a side note, the good old multisecond delay before bdflush kicks in
> > doesn't really make a lot of sense - when bandwidth is available the
> > filesystem-initiated writeouts should happen right away.
>
> ... thus spinning up the disk ?

Nope, the disk is already spinning, some other writeouts just finished.

> How about just making sure we write out a bigger bunch
> of dirty pages whenever one buffer gets too old ?

It's simpler than that.  It's basically just: disk traffic low? good, write 
out all the dirty buffers.  Not quite as crude as that, but nearly.

> Does the patch below do anything good for your laptop? ;)

I'll wait for the next one ;-)

--
Daniel