v2: Only convert virtio-{blk,scsi}. [Paolo] This series is based on top of Cornelia's
[PATCH 0/6] virtio: refactor host notifiers The benifit is we don't use event_notifier_set_handler even in non-dataplane now, which in turn makes virtio-blk and virtio-scsi follow block layer aio context semantics. Specifically, I/O requests must come from blk_get_aio_context(blk) events, rather than iohandler_get_aio_context(), so that bdrv_drained_begin/end will work as expected. Patch 4 reverts the hack (ab27c3b5e7) we added for 2.6. Lately, commit b880481579 added another pair of bdrv_drained_begin/end so the crash cannot happen even without ab27c3b5e7, but in order to avoid leaking requests, patch two is still a must. Fam Zheng (7): virtio-bus: Drop "set_handler" parameter virtio: Add typedef for handle_output virtio: Introduce virtio_add_queue_aio virtio: Use aio_set_event_notifier for aio vq virtio-blk: Call virtio_add_queue_aio virtio-scsi: Call virtio_add_queue_aio Revert "mirror: Workaround for unexpected iohandler events during completion" block/mirror.c | 9 --------- hw/block/virtio-blk.c | 2 +- hw/scsi/virtio-scsi.c | 9 +++------ hw/virtio/virtio-bus.c | 11 +++++------ hw/virtio/virtio.c | 40 ++++++++++++++++++++++++++++++++-------- include/hw/virtio/virtio.h | 8 ++++++-- 6 files changed, 47 insertions(+), 32 deletions(-) -- 2.8.3