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Date: Wed, 4 Aug 2010 12:27:13 +0300
From: Gleb Natapov <gleb@redhat.com>
Subject: Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with
	Linux 2.6.35?
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To: "Richard W.M. Jones" <rjones@redhat.com>
Cc: kvm@vger.kernel.org, Avi Kivity <avi@redhat.com>, qemu-devel@nongnu.org

On Wed, Aug 04, 2010 at 10:24:28AM +0100, Richard W.M. Jones wrote:
> On Wed, Aug 04, 2010 at 08:54:35AM +0300, Avi Kivity wrote:
> >  On 08/04/2010 01:06 AM, Richard W.M. Jones wrote:
> > >On Tue, Aug 03, 2010 at 10:24:41PM +0300, Avi Kivity wrote:
> > >>Why do we need to transfer roms?  These are devices on the memory
> > >>bus or pci bus, it just needs to be there at the right address.
> > >>Boot splash should just be another rom as it would be on a real
> > >>system.
> > >Just like the initrd?
> > 
> > There isn't enough address space for a 100MB initrd in ROM.
> 
> Because of limits of the original PC, sure, where you had to fit
> everything in 0xa0000-0xfffff or whatever it was.
> 
> But this isn't a real PC.
> 
In what way it is not?

> You can map the read-only memory anywhere you want.
> 
You can't. Guests expects certain memory layouts.

--
			Gleb.