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Date: Tue, 06 Sep 2011 09:31:32 -0500
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: Re: [Qemu-devel] glib mainloop breaks virtfs
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To: Gerd Hoffmann <kraxel@redhat.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>

On 09/06/2011 06:22 AM, Gerd Hoffmann wrote:
> Hi,
>
> virtfs stopped working for me in master, the guest (fedora 15) just
> hangs at boot when mounting the virtfs filesystems. Bisecting points to
> this commit:
>
> rincewind kraxel ~/projects/qemu ((69e5bb6...)|BISECTING)# git bisect good
> 4d88a2ac8643265108ef1fb47ceee5d7b28e19f2 is the first bad commit
> commit 4d88a2ac8643265108ef1fb47ceee5d7b28e19f2
> Author: Anthony Liguori <aliguori@us.ibm.com>
> Date: Mon Aug 22 08:12:53 2011 -0500
>
> main: switch qemu_set_fd_handler to g_io_add_watch

The v9fs code uses qemu_set_fd_handler to trigger coroutines.  I suspect 
this is not going to be a fun one to debug.

This changeset changes the ordering of when callbacks are fired so it 
may be triggering a latent bug in the coroutine usage in virtio-9p. 
Aneesh, can you take a look at it?

Regards,

Anthony Liguori

>
> cheers,
> Gerd
>