[Qemu-devel] [PATCH 0/4] Tweaks around virtio-blk start/stop

[Fam Zheng]

These are some ideas originated from analyzing the Christian's crash report on
virtio-blk dataplane torture test:

https://lists.gnu.org/archive/html/qemu-devel/2016-03/msg02093.html

The ideas are mostly inspired/suggested by Paolo. This doesn't fix the bug, but
the first and the last patches seem to make the crash less frequent.  Also
thanks Cornelia Huck for reviewing the draft version posted in that thread.


Fam Zheng (4):
  block: Use drained section in bdrv_set_aio_context
  block-backend: Introduce blk_drained_begin/end
  virtio-blk: Use blk_drained_begin/end around dataplane stop
  virtio-blk: Clean up start/stop with mutex and BH

 block.c                         |  4 ++-
 block/block-backend.c           | 14 ++++++++++
 hw/block/dataplane/virtio-blk.c | 58 +++++++++++++++++++++++++++++++----------
 hw/block/virtio-blk.c           |  3 ++-
 include/sysemu/block-backend.h  |  2 ++
 5 files changed, 65 insertions(+), 16 deletions(-)

-- 
2.4.3