[Qemu-devel] [PATCH 0/6] virtio: Merge virtio-{blk, scsi} host notifier handling paths

[Fam Zheng]

v3: Rebase to master.
    Squash 4 into 3. [Paolo]
    Add comment and commit message. [Stefan]
    Add Stefan's r-b in patch 1 and 2.

v2: Only convert virtio-{blk,scsi}. [Paolo]

The benifit of this 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 (6):
  virtio-bus: Drop "set_handler" parameter
  virtio: Add typedef for handle_output
  virtio: Introduce virtio_add_queue_aio
  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     | 13 ++++++-------
 hw/virtio/virtio.c         | 45 +++++++++++++++++++++++++++++++++++++--------
 include/hw/virtio/virtio.h |  8 ++++++--
 6 files changed, 53 insertions(+), 33 deletions(-)

-- 
2.7.4