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Re: [Qemu-devel] [patch] non-blocking disk IO
From: |
Troy Benjegerdes |
Subject: |
Re: [Qemu-devel] [patch] non-blocking disk IO |
Date: |
Mon, 3 Oct 2005 20:34:18 -0500 |
User-agent: |
Mutt/1.5.9i |
On Mon, Oct 03, 2005 at 08:41:46AM -0400, John Coiner wrote:
>
> Magnus,
>
> I don't think the Windows 2000 install hack will ever be obsolete.
>
> The installer assumes that a hard disk will take nonzero time to read
> some data. QEMU always services a read in zero-guest-time. (With the
> nonblocking IO patch, zero-guest-time reads still occur, when the
> requested data is in the host's file cache.)
>
> I doubt the IDE spec allows Windows to make this assumption... but the
> assumption is there, and we work around it by adding a delay that's
> visible to the guest.
There are other bugs in the IDE emulation..
I need to try this latest patch, but with the previous DMA patch
(without non-blocking support) having a disk image on an AFS filesystem
just did not work at all.
I am also haveing trouble getting a fresh win2k install under qemu to actually
be able to run windows update.
Re: [Qemu-devel] [patch] non-blocking disk IO, Fabrice Bellard, 2005/10/03
Re: [Qemu-devel] [patch] non-blocking disk IO, Brad Campbell, 2005/10/04
Re: [Qemu-devel] [patch] non-blocking disk IO, John Coiner, 2005/10/03
- Re: [Qemu-devel] [patch] non-blocking disk IO,
Troy Benjegerdes <=