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Subject: Re: 2.4.18-pre7 slow ... apm problem
To: jdthood@mail.com (Thomas Hood)
Date: Mon, 28 Jan 2002 00:32:19 +0000 (GMT)
Cc: linux-kernel@vger.kernel.org, sfr@canb.auug.org.au (Stephen Rothwell)
In-Reply-To: <1012176940.2576.102.camel@thanatos> from "Thomas Hood" at Jan 27, 2002 07:15:38 PM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> > 1) keyboard rate is a bit slow on 2.4.18-pre7 compared to
> >    2.4.18-pre6.
> > 2) On vmware 3.0, ping localhost is very slow. 2.4.18-pre6
> >    has not such problem.
> >
> > After disabling CONFIG_APM_CPU_IDLE, the system works fast again.
> > With pre6 or earlier versions, system works fine though even with
> > CONFIG_APM_CPU_IDLE enabled.
> 
> Idle handling in the apm driver was modified in 2.4.18-pre7 .
> Back to the drawing board ...

The keyboard rate one is curious. The vmware one I can easily believe is
caused by Vmware switching in/out of OS's without managing the APM
state of the processor (and leaving it in powersave)

Not sure its drawing board time, just a little investigation.

Alan
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