[Qemu-devel] [PATCH 0/3] make bh safe with hot-unplug

[Liu Ping Fan <qemulist@gmail.com>]

This series relies on refcnt of object used by bh callback to run against unplug.

Open issue:
Another choice may be rcu, but I think some issues are hard to resolve.
Using rcu, we have two choice:
  when holding object refcnt, call qemu_bh_delete(); then after grace period, we can release.
  Or making qemu_bh_delete() sync in the path of DeviceState's finalization.
but currently, the callers of qemu_bh_delete() can not satisfy any of the two condition.

Liu Ping Fan (3):
  QEMUBH: introduce canceled member for bh
  QEMUBH: pin bh's referring object while scheduling
  virtio-net: set referred object for virtio net's bh

 async.c             | 37 ++++++++++++++++++++++++++++++++-----
 hw/net/virtio-net.c |  1 +
 include/block/aio.h |  6 ++++++
 stubs/Makefile.objs |  1 +
 4 files changed, 40 insertions(+), 5 deletions(-)

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1.8.1.4