Cornelia Huck 8caf907f07 dataplane: Fix startup race. ... 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.huck@de.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>		2013-09-06 15:25:09 +02:00
..
ioq.c	hw: move virtio devices to hw/ subdirectories	2013-04-08 18:13:12 +02:00
ioq.h	hw: move virtio devices to hw/ subdirectories	2013-04-08 18:13:12 +02:00
Makefile.objs	hw: move virtio devices to hw/ subdirectories	2013-04-08 18:13:12 +02:00
virtio-blk.c	dataplane: Fix startup race.	2013-09-06 15:25:09 +02:00
virtio-blk.h	hw: move virtio devices to hw/ subdirectories	2013-04-08 18:13:12 +02:00