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-rw-r--r--erts/emulator/beam/erl_process.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index f6afc066ce..799f1a3cc9 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -1060,6 +1060,8 @@ scheduler_wait(long *fcalls, ErtsSchedulerData *esdp, ErtsRunQueue *rq)
sys_poll_aux_work:
+ ASSERT(!erts_port_task_have_outstanding_io_tasks());
+
erl_sys_schedule(1); /* Might give us something to do */
dt = do_time_read_and_reset();
@@ -1155,6 +1157,8 @@ scheduler_wait(long *fcalls, ErtsSchedulerData *esdp, ErtsRunQueue *rq)
erts_smp_runq_unlock(rq);
+ ASSERT(!erts_port_task_have_outstanding_io_tasks());
+
erl_sys_schedule(0);
dt = do_time_read_and_reset();
@@ -7165,7 +7169,9 @@ Process *schedule(Process *p, int calls)
erts_smp_atomic_set(&function_calls, 0);
fcalls = 0;
+
ASSERT(!erts_port_task_have_outstanding_io_tasks());
+
#ifdef ERTS_SMP
/* erts_sys_schedule_interrupt(0); */
#endif