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[Qemu-block] [PATCH v2 0/7] virtio: Merge virtio-{blk, scsi} host notifi

From: Fam Zheng
Subject: [Qemu-block] [PATCH v2 0/7] virtio: Merge virtio-{blk, scsi} host notifier handling paths
Date: Fri, 24 Jun 2016 20:39:27 +0800

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

 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(-)


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