linux-kernel - Re: [PATCH 3/6] lguest suppress IDE probing

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Date:	Wed, 6 Jun 2007 11:23:08 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	lkml - Kernel Mailing List <linux-kernel@...r.kernel.org>,
	bzolnier@...il.com, Matt Mackall <mpm@...enic.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>
Subject: Re: [PATCH 3/6] lguest suppress IDE probing

> Actually, Jeremy suggested claiming the entire IO space.  That works for
> Xen domU too, and makes some amount of sense.

Agreed

> > Better yet just don't compile in the old IDE stuff, lguest doesn't have a
> > PCI or ISA bus anyway.
> 
> Sure, but the "run the same kernel as guest and host" is a really nice
> feature.

Modules dear boy, modules ;)

> > Alternatively make the IDE I/O space return 0xFF and it'll skip them
> > anyway.
> 
> Hmm, every "in" should be returning 0xFFs, but I still get the delay and
> the probing.  Xen domU gets it too.

Can you see in a debugger where it is spending the time. 0xFF should be
taken as "no port, move on nothing to see"
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