On Mon, 2014-03-03 at 12:28 -0300, Thadeu Lima de Souza Cascardo wrote:
> On Mon, Mar 03, 2014 at 08:09:22AM -0700, Alex Williamson wrote:
> > On Mon, 2014-03-03 at 11:33 -0300, Thadeu Lima de Souza Cascardo wrote:
> > > When we unbind vfio-pci from a device, while running a guest, we might
> > > h
On Mon, Mar 03, 2014 at 08:09:22AM -0700, Alex Williamson wrote:
> On Mon, 2014-03-03 at 11:33 -0300, Thadeu Lima de Souza Cascardo wrote:
> > When we unbind vfio-pci from a device, while running a guest, we might
> > have a deadlock when such a guest reboots.
> >
> > Unbind takes device_lock at d
On Mon, 2014-03-03 at 11:33 -0300, Thadeu Lima de Souza Cascardo wrote:
> When we unbind vfio-pci from a device, while running a guest, we might
> have a deadlock when such a guest reboots.
>
> Unbind takes device_lock at device_release_driver, and waits for
> release_q at vfio_del_group_dev.
>
>
When we unbind vfio-pci from a device, while running a guest, we might
have a deadlock when such a guest reboots.
Unbind takes device_lock at device_release_driver, and waits for
release_q at vfio_del_group_dev.
release_q will only be woken up when all references to vfio_device are
gone, and that
