Stefan Hajnoczi <stefa...@gmail.com> writes: > On Mon, Oct 05, 2015 at 11:07:23AM +0200, Greg Kurz wrote: >> If the user tries to hot unplug a virtio-9p device, it seems to succeed but >> in fact: >> - virtio-9p coroutines thread pool and async queue are leaked >> - QEMU crashes in virtio_vmstate_change() if the user tries to live migrate >> >> This patch brings hot unplug support to virtio-9p-device. It fixes both >> above issues. >> >> Signed-off-by: Greg Kurz <gk...@linux.vnet.ibm.com> >> --- >> hw/9pfs/virtio-9p-device.c | 12 ++++++++++++ >> 1 file changed, 12 insertions(+) > > What happens to in-flight I/O requests? We cannot assume that the guest > driver quiesces the device.
We enable migration blocker when we have an active mount. So if we get here, that should indicate no active 9p mounts. -aneesh
