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Date: Tue, 30 Oct 2012 17:47:41 +0100
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Subject: Re: [Qemu-devel] [PATCH uq/master 0/3] Fix MSI injection at load
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Cc: kvm@vger.kernel.org, jan.kiszka@siemens.com, mtosatti@redhat.com, qemu-devel@nongnu.org, avi@redhat.com, Amit Shah <amit.shah@redhat.com>

Il 30/10/2012 13:16, Paolo Bonzini ha scritto:
> A simplified reproducer (that doesn't hang Linux,
> but shows the message) is to start the VM without a backend for the
> virtserialport, and to resume it with a backend, for example
> 
> $ qemu-system-x86_64 -device virtio-serial-pci -device virtserialport test.img --enable-kvm -m 512
> $ qemu-system-x86_64 -device virtio-serial-pci -chardev stdio,id=vs0 -device virtserialport,chardev=vs0 test.img --enable-kvm -m 512 -incoming 'exec:cat foo.ckp'

Jan, Amit,

the same bug is also happening without MSI.  The reproducer is the same
as above, but with pci=nomsi for Linux guests.  After migration, "cat
/dev/vport0p1" will not block, and if you have a NIC on the same line as
virtio-serial it will also not work.

Do any of you have some time to look at it?

Paolo