[PATCH v2 0/6] aio-posix: split poll check from ready handler

[Stefan Hajnoczi <stefanha@xxxxxxxxxx>]

v2:
- Cleaned up unused return values in nvme and virtio-blk [Stefano]
- Documented try_poll_mode() ready_list argument [Stefano]
- Unified virtio-blk/scsi dataplane and non-dataplane virtqueue handlers 
[Stefano]

The first patch improves AioContext's adaptive polling execution time
measurement. This can result in better performance because the algorithm makes
better decisions about when to poll versus when to fall back to file descriptor
monitoring.

The remaining patches unify the virtio-blk and virtio-scsi dataplane and
non-dataplane virtqueue handlers. This became possible because the dataplane
handler function now has the same function signature as the non-dataplane
handler function. Stefano Garzarella prompted me to make this refactoring.

Stefan Hajnoczi (6):
  aio-posix: split poll check from ready handler
  virtio: get rid of VirtIOHandleAIOOutput
  virtio-blk: drop unused virtio_blk_handle_vq() return value
  virtio-scsi: prepare virtio_scsi_handle_cmd for dataplane
  virtio: use ->handle_output() instead of ->handle_aio_output()
  virtio: unify dataplane and non-dataplane ->handle_output()

 include/block/aio.h             |  4 +-
 include/hw/virtio/virtio-blk.h  |  2 +-
 include/hw/virtio/virtio.h      |  5 +-
 util/aio-posix.h                |  1 +
 block/curl.c                    | 11 ++--
 block/io_uring.c                | 19 ++++---
 block/iscsi.c                   |  4 +-
 block/linux-aio.c               | 16 +++---
 block/nfs.c                     |  6 +--
 block/nvme.c                    | 51 ++++++++++++-------
 block/ssh.c                     |  4 +-
 block/win32-aio.c               |  4 +-
 hw/block/dataplane/virtio-blk.c | 16 +-----
 hw/block/virtio-blk.c           | 14 ++----
 hw/scsi/virtio-scsi-dataplane.c | 60 +++-------------------
 hw/scsi/virtio-scsi.c           |  2 +-
 hw/virtio/virtio.c              | 73 +++++++++------------------
 hw/xen/xen-bus.c                |  6 +--
 io/channel-command.c            |  6 ++-
 io/channel-file.c               |  3 +-
 io/channel-socket.c             |  3 +-
 migration/rdma.c                |  8 +--
 tests/unit/test-aio.c           |  4 +-
 util/aio-posix.c                | 89 +++++++++++++++++++++++++--------
 util/aio-win32.c                |  4 +-
 util/async.c                    | 10 +++-
 util/main-loop.c                |  4 +-
 util/qemu-coroutine-io.c        |  5 +-
 util/vhost-user-server.c        | 11 ++--
 29 files changed, 217 insertions(+), 228 deletions(-)

-- 
2.33.1