On Tue, 6 Oct 2015 09:09:14 +0100 Stefan Hajnoczi <stefa...@gmail.com> wrote:
> 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 can assume that the guest has unmounted the 9p share otherwise migration is blocked... is it possible we still have in-flight I/O requests in this scenario ?
