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Subject: Re: 2.4.x & Celeron = very slow system
To: administrator@svitonline.com
Date: Sun, 19 Aug 2001 14:55:05 +0100 (BST)
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <no.id> from "Serguei I. Ivantsov" at Aug 19, 2001 04:06:18 PM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> With 2.4.x kernel my system (Celeron (Coppermine) 850Mhz (100x8.5)
> 256Mb i810) behaves like slow i386sx.
> For example, when I extract 25MB gzip file on 2.2.19 kernel - it
> takes about 12 seconds, but with 2.4.8(9) - 6(!) MINUTES on the SAME
> system...
> The only idea is that 2.4.x kernel turns off cache (L1 & L2) on
> processor (on my cpu). How can I check it? Any ideas?

We don't touch the caches like that. First guess is to disable the ACPI
support, because we've seen that do a million bogus things