[Qemu-devel] [RFC PATCH 0/3] virtio-blk: add multiread support

[Peter Lieven <pl@kamp.de>]

this series adds the long missing multiread support to virtio-blk.

some remarks:
 - i introduced rd_merged and wr_merged block accounting stats to
   blockstats as a generic interface which can be set from any
   driver that will introduce multirequst merging in the future.
 - the knob to disable request merging is not yet there. I would
   add it to the device properties also as a generic interface
   to have the same switch on for any driver that might introduce
   request merging in the future
 - there is cleanup and iotest adjustion missing.

Peter Lieven (3):
  block: add accounting for merged requests
  hw/virtio-blk: add a constant for max number of merged requests
  virtio-blk: introduce multiread

 block.c                         |    2 +
 block/accounting.c              |    7 ++
 block/qapi.c                    |    2 +
 hmp.c                           |    6 +-
 hw/block/dataplane/virtio-blk.c |   10 +-
 hw/block/virtio-blk.c           |  222 ++++++++++++++++++++++++---------------
 include/block/accounting.h      |    3 +
 include/hw/virtio/virtio-blk.h  |   21 ++--
 qapi/block-core.json            |   10 +-
 9 files changed, 184 insertions(+), 99 deletions(-)

-- 
1.7.9.5