Re: [Qemu-devel] [PATCH uq/master 0/3] Fix MSI injection at load time

2012-10-30 Thread Jan Kiszka
On 2012-10-30 17:47, Paolo Bonzini wrote: > 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-

Re: [Qemu-devel] [PATCH uq/master 0/3] Fix MSI injection at load time

2012-10-30 Thread Paolo Bonzini
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 virtser

[Qemu-devel] [PATCH uq/master 0/3] Fix MSI injection at load time

2012-10-30 Thread Paolo Bonzini
Alexander Larsson reported a migration bug where after migration the Windows virtio-serial driver was not able to read anymore, not seeing the data from the host. He debugged it and noticed that after migration the virtio-serial driver ddid not respond to any irqs. During restore we virtio_notify