From: Troy Benjegerdes <hozer@hozed.org>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [patch] non-blocking disk IO
Date: Mon, 3 Oct 2005 20:34:18 -0500 [thread overview]
Message-ID: <20051004013418.GF4612@kalmia.hozed.org> (raw)
In-Reply-To: <4341270A.1000908@stanfordalumni.org>
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.
next prev parent reply other threads:[~2005-10-04 1:34 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-03 12:41 [Qemu-devel] [patch] non-blocking disk IO John Coiner
2005-10-04 1:34 ` Troy Benjegerdes [this message]
2005-10-04 3:16 ` John Coiner
2005-10-04 14:26 ` Troy Benjegerdes
2005-10-04 22:11 ` John Coiner
2005-10-05 3:17 ` Troy Benjegerdes
-- strict thread matches above, loose matches on Subject: below --
2005-10-03 6:49 John Coiner
2005-10-03 7:09 ` Magnus Damm
2005-10-03 9:57 ` Elefterios Stamatogiannakis
2005-10-03 12:58 ` Christian MICHON
2005-10-04 7:17 ` John Coiner
2005-10-04 7:46 ` Christian MICHON
2005-10-04 8:52 ` Elefterios Stamatogiannakis
2005-10-04 9:35 ` Christian MICHON
2005-10-04 11:19 ` Christian MICHON
2005-10-04 12:22 ` Jens Axboe
2005-10-04 13:14 ` John Coiner
2005-10-04 13:20 ` Christian MICHON
2005-10-03 13:58 ` Jens Axboe
2005-10-03 22:29 ` John Coiner
2005-10-04 6:41 ` Jens Axboe
2005-10-04 1:35 ` Troy Benjegerdes
2005-10-04 3:25 ` John Coiner
2005-10-04 3:49 ` Henrik Nordstrom
2005-10-04 5:24 ` Troy Benjegerdes
2005-10-04 6:44 ` Jens Axboe
2005-10-03 18:33 ` Fabrice Bellard
2005-10-04 20:40 ` Brad Campbell
2005-10-04 23:03 ` John Coiner
2005-10-05 11:27 ` Brad Campbell
2005-10-05 14:28 ` Troy Benjegerdes
2005-11-28 22:41 ` Ryan Rempel
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