These few patches are the result of a random hacking I did to make the qemu
cope with eventfd allocation failure, when using an iothread,
as it happened in bz #1897550.
I am not 100% sure which patches in this series are worth to merge, or if
this can be fixed in a better way.
After this patch series applied, qemu still hangs while running reproducer for
this BZ due to ABBA lock inversion which needs some heavy rework to get rid of.
I explained all the (gory) details in the bugzilla.
This patch series was (lightly) tested with make check, iotests and with
the reproducer.
Best regards,
Maxim Levitsky
Maxim Levitsky (3):
scsi: virtio-scsi: don't process IO on fenced dataplane
virtio-scsi: don't uninitialize queues that we didn't initialize
event_notifier: handle initialization failure better
hw/scsi/virtio-scsi-dataplane.c | 26 +++++++++++++++++++-------
include/qemu/event_notifier.h | 1 +
util/event_notifier-posix.c | 16 ++++++++++++++++
3 files changed, 36 insertions(+), 7 deletions(-)