On Thu, May 04, 2023 at 03:53:18PM -0400, Stefan Hajnoczi wrote: > Detach event channels during drained sections to stop I/O submission > from the ring. xen-block is no longer reliant on aio_disable_external() > after this patch. This will allow us to remove the > aio_disable_external() API once all other code that relies on it is > converted. > > Extend xen_device_set_event_channel_context() to allow ctx=NULL. The > event channel still exists but the event loop does not monitor the file > descriptor. Event channel processing can resume by calling > xen_device_set_event_channel_context() with a non-NULL ctx. > > Factor out xen_device_set_event_channel_context() calls in > hw/block/dataplane/xen-block.c into attach/detach helper functions. > Incidentally, these don't require the AioContext lock because > aio_set_fd_handler() is thread-safe. > > It's safer to register BlockDevOps after the dataplane instance has been > created. The BlockDevOps .drained_begin/end() callbacks depend on the > dataplane instance, so move the blk_set_dev_ops() call after > xen_block_dataplane_create(). > > Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
Reviewed-by: Anthony PERARD <anthony.per...@citrix.com> Thanks, -- Anthony PERARD
