On Wed, Sep 04, 2013 at 02:16:15PM +0200, Cornelia Huck wrote: > Avoid trying to setup dataplane again if dataplane setup is already in > progress. This may happen if an eventfd is triggered during setup. > > I saw this occasionally with an experimental s390 irqfd implementation: > > virtio_blk_handle_output > -> virtio_blk_data_plane_start > -> virtio_ccw_set_host_notifier > ... > -> virtio_queue_set_host_notifier_fd_handler > -> virtio_queue_host_notifier_read > -> virtio_queue_notify_vq > -> virtio_blk_handle_output > -> virtio_blk_data_plane_start > -> vring_setup > -> hostmem_init > -> memory_listener_register > -> BOOM > > As virtio-ccw tries to follow what virtio-pci does, it might be triggerable > for other platforms as well. > > Signed-off-by: Cornelia Huck <cornelia.h...@de.ibm.com> > --- > hw/block/dataplane/virtio-blk.c | 9 +++++++++ > 1 file changed, 9 insertions(+)
Thanks, applied to my block tree: https://github.com/stefanha/qemu/commits/block Stefan
