This is a regression test for a deadlock that occurred in block job completion callbacks (via job_defer_to_main_loop) because the AioContext lock was taken twice: once in job_finish_sync() and then again in job_defer_to_main_loop_bh(). This would cause AIO_WAIT_WHILE() to hang.
Signed-off-by: Kevin Wolf <kw...@redhat.com> --- tests/test-bdrv-drain.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tests/test-bdrv-drain.c b/tests/test-bdrv-drain.c index ab055e85f8..9641a20dd8 100644 --- a/tests/test-bdrv-drain.c +++ b/tests/test-bdrv-drain.c @@ -776,6 +776,11 @@ typedef struct TestBlockJob { static void test_job_completed(Job *job, void *opaque) { + TestBlockJob *s = container_of(job, TestBlockJob, common.job); + + /* Provoke an AIO_WAIT_WHILE() call to verify there is no deadlock */ + blk_flush(s->common.blk); + job_completed(job, 0, NULL); } -- 2.13.6