The limitation should be documented. Removing it is a post 2.6 material. Signed-off-by: Fam Zheng <f...@redhat.com> --- include/block/block.h | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/include/block/block.h b/include/block/block.h index 3a73137..bb67652 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -530,6 +530,11 @@ void bdrv_flush_io_queue(BlockDriverState *bs); * this doesn't block timers or coroutines from submitting more requests, which * means block_job_pause is still necessary. * + * for now this only affacts the aio event loops (namely the data-plane + * iothreads and nested aio_poll() calls in block layer). Specifically, the + * main loop can still dispatch external events, even after bdrv_drained_begin + * is called. + * * This function can be recursive. */ void bdrv_drained_begin(BlockDriverState *bs); -- 2.8.0
