[Qemu-devel] [PATCH 0/3] block: more fixes to job cancellation

[Paolo Bonzini]

Kevin noted how the part of stream_run() that is after the for loop
runs with s->common.busy = false. At least bdrv_change_backing_file()
can yield, possibly other functions, too.

The race window is really small but it's there.  The patch takes a more
flexible implementation of block_job_cancel_sync from the mirroring
patches so that the race can be fixed easily.

Paolo Bonzini (3):
  block: allow interrupting a co_sleep_ns
  block: wait for job callback in block_job_cancel_sync
  block: mark streaming job busy at the end

 block.c                |   41 +++++++++++++++++++++++++++++++++++++++--
 block/stream.c         |    8 ++++----
 block_int.h            |   17 ++++++++++++-----
 qemu-coroutine-sleep.c |    3 ++-
 4 files changed, 57 insertions(+), 12 deletions(-)

-- 
1.7.9.3