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Date: Tue, 5 Aug 2003 16:36:01 -0700
From: Andrew Morton <akpm@osdl.org>
To: Peter Chubb <peter@chubb.wattle.id.au>
Cc: martin.konold@erfrakon.de, linux-kernel@vger.kernel.org
Subject: Re: Interactive Usage of 2.6.0.test1 worse than 2.4.21
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Peter Chubb <peter@chubb.wattle.id.au> wrote:
>
> >> when using 2.6.0.test1 on a high end laptop (P-IV 2.2 GHz, 1GB RAM)
>  >> I notice very significant slowdown in interactive usage compared to
>  >> 2.4.21.
>  >> 
>  >> The difference is most easily seen when switching folders in
>  >> kmail. While 2.4.21 is instantaneous 2.6.0.test1 shows the clock
>  >> for about 2-3 seconds.
>  >> 
> 
>  I see the same problem, and I'm using XFS.  Booting with
>  elevator=deadline fixed it for me.  The anticipatory scheduler hurts
>  if you have a disc optimised for low power consumption, not speed.

Do you have a specific set of steps with which to reproduce this?