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Re: [Qemu-devel] qemu/qemu-kvm floppy regression brought by 212ec7baa28c


From: Cleber Rosa
Subject: Re: [Qemu-devel] qemu/qemu-kvm floppy regression brought by 212ec7baa28cc9d819234fed1541fc1423cfe3d8
Date: Wed, 26 Oct 2011 13:30:43 -0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:7.0) Gecko/20110927 Thunderbird/7.0

On 10/26/2011 12:47 PM, Kevin Wolf wrote:
Am 26.10.2011 16:41, schrieb Lucas Meneghel Rodrigues:
Hi folks:

We've captured a regression with floppy disk on recent qemu (and
qemu-kvm, after a code merge). We bisected it to be caused by:

commit 212ec7baa28cc9d819234fed1541fc1423cfe3d8
Author: Richard Henderson<address@hidden>
Date:   Mon Aug 15 15:08:45 2011 -0700

      fdc: Convert to isa_register_portio_list

      Signed-off-by: Richard Henderson<address@hidden>
      Signed-off-by: Avi Kivity<address@hidden>

Since this commit, the guest doesn't see a floppy disk attached to it
anymore, blocking kvm autotest ability to install windows guests
automatically. This is a big deal for kvm autotest (ruins our automated
regression jobs), so please take a look at it.
Can you please try again with the latest block branch? I think there is
a patch queued that will fix it.

Kevin

Kevin,

The behaviour of the latest block branch is indeed different, but not much better.

In my quick manual test, booting via a FreeDOS floppy image:

* latest master: does not seem to read the floppy at all
* latest block: reads the floppy only to the point that 'FreeDOS' is printed in the console

All other qemu/qemu-kvm versions tested (for example 0.15.0), successfully read and boot the same image.

CR.



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