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Subject: Re: ide-cs using 100% CPU
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Hamie <hamish@travellingkiwi.com>
Cc: Russell King <rmk+lkml@arm.linux.org.uk>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Gwe, 2004-08-06 at 20:33, Hamie wrote:
> Is 100% CPU not excessive? IIRC my PIII-750 used to use less CPU doing 
> the same job as quick, or even slightly faster...

PCMCIA IDE is PIO only so it burns CPU. This is one case where
hyperthreading is nice. Cardbus IDE is a lot better but very little
exists and we don't currently support hotplug IDE controllers.

> And should it not use system CPU rather than user CPU?

Yes - but figure out please if the kernel or userspace is getting that
wrong ;)

Alan