- while (taskq_dispatch(spa->spa_zio_taskq[t][q],
- (task_func_t *)zio_execute, zio, flags) == 0); /* do nothing */
+ /*
+ * NB: We are assuming that the zio can only be dispatched
+ * to a single taskq at a time. It would be a grievous error
+ * to dispatch the zio to another taskq at the same time.
+ */
+ ASSERT(taskq_empty_ent(&zio->io_tqent));
+ taskq_dispatch_ent(spa->spa_zio_taskq[t][q],
+ (task_func_t *)zio_execute, zio, flags, &zio->io_tqent);