[Qemu-block] [PATCH 0/4] virtio: Merge two host notifier handling paths

[Fam Zheng]

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 (4):
  virtio: Add typedef for handle_output
  virtio: Always use aio path to set host handler
  virtio: Drop the unused virtio_queue_set_host_notifier_fd_handler code
  Revert "mirror: Workaround for unexpected iohandler events during
    completion"

 block/mirror.c                  |  9 ---------
 hw/block/dataplane/virtio-blk.c |  6 +++---
 hw/scsi/virtio-scsi-dataplane.c |  9 +++++----
 hw/virtio/virtio-bus.c          | 13 +++++++++----
 hw/virtio/virtio.c              | 43 ++++++++++++-----------------------------
 include/hw/virtio/virtio.h      | 13 ++++++-------
 6 files changed, 35 insertions(+), 58 deletions(-)

-- 
2.8.3