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Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2
From: |
Gleb Natapov |
Subject: |
Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35? |
Date: |
Wed, 4 Aug 2010 15:07:21 +0300 |
On Wed, Aug 04, 2010 at 12:33:18PM +0100, Richard W.M. Jones wrote:
> On Wed, Aug 04, 2010 at 12:52:23PM +0300, Avi Kivity wrote:
> > On 08/04/2010 12:24 PM, Richard W.M. Jones wrote:
> > >>>
> > >>>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.
> > >
> > >You can map the read-only memory anywhere you want.
> >
> > I wasn't talking about the 1MB limit, rather the 4GB limit. Of
> > that, 3-3.5GB are reserved for RAM, 0.5-1GB for PCI. Putting large
> > amounts of ROM in that space will cost us PCI space.
>
> I'm only allocating 500MB of RAM, so there's easily enough space to
> put a large ROM, with tons of room for growth (of both RAM and ROM).
> Yes, even real hardware has done this. The Weitek math copro mapped
> itself in at physical memory addresses c0000000 (a 32 MB window IIRC).
>
c0000000 is 3G. This is where PCI windows starts usually (configurable
in the chipset). Don't see anything unusual in this particular HW.
--
Gleb.
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, (continued)
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Richard W.M. Jones, 2010/08/03
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Richard W.M. Jones, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Gleb Natapov, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Richard W.M. Jones, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?,
Gleb Natapov <=
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Anthony Liguori, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Gleb Natapov, 2010/08/03
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Richard W.M. Jones, 2010/08/03
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Gleb Natapov, 2010/08/03
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Anthony Liguori, 2010/08/03
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/03
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Richard W.M. Jones, 2010/08/03
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Anthony Liguori, 2010/08/03
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Paolo Bonzini, 2010/08/03
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Anthony Liguori, 2010/08/03