[PATCH 0/2] virtio-blk: Avoid processing requests on the main context on restart

[Sergio Lopez]

On restart, we were scheduling a BH to process queued requests, which
would run before starting up the data plane, leading to those requests
being assigned and started on coroutines on the main context.

This could cause requests to be wrongly processed in parallel from
different threads (the main thread and the iothread managing the data
plane), potentially leading to multiple issues.

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1812765

See "virtio-blk: Disable request queuing while switching contexts" for
previous discussion:

 - https://lists.gnu.org/archive/html/qemu-devel/2020-06/msg00304.html

Sergio Lopez (2):
  virtio-blk: Refactor the code that processes queued requests
  virtio-blk: On restart, process queued requests in the proper context

 include/hw/virtio/virtio-blk.h  |  1 +
 hw/block/dataplane/virtio-blk.c |  8 ++++++++
 hw/block/virtio-blk.c           | 30 +++++++++++++++++++++---------
 3 files changed, 30 insertions(+), 9 deletions(-)

-- 
2.26.2