On 20.06.22 20:49, Ben Hutchings wrote: > I've tested a 5.19-rc3 kernel on top of QEMU/KVM with machine type > pc-q35-5.2. It has a virtio balloon device defined in libvirt as: > > <memballoon model="virtio"> > <address type="pci" domain="0x0000" bus="0x05" slot="0x00" > function="0x0"/> > </memballoon> > > but the virtio_balloon driver fails to bind to it: > > virtio_balloon virtio4: init_vqs: add stat_vq failed > virtio_balloon: probe of virtio4 failed with error -5 >
Hmm, I don't see any recent changes to drivers/virtio/virtio_balloon.c virtqueue_add_outbuf() fails with -EIO if I'm not wrong. That's the first call of virtqueue_add_outbuf() when virtio_balloon initializes. Maybe something in generic virtio code changed? -- Thanks, David / dhildenb
