man. 21. jun. 2021 kl. 11:50 skrev Vincent Guittot <vincent.guit...@linaro.org>:
> This means that a child's load was not null and it was inserted
> whereas parent's load was null. This should not happen unless the
> propagation failed somewhere
My initial thought is that the patch below will fix it, if that is the
issue (that a leaf is inserted, but the propagation is not "completed"
in unthrottle). Might that be the case? Still working on reproducing
the issue tho.
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index bfaa6e1f6067..015c5a5c1a4d 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -4930,12 +4930,7 @@ void unthrottle_cfs_rq(struct cfs_rq *cfs_rq)
if (cfs_rq_throttled(cfs_rq))
goto unthrottle_throttle;
- /*
- * One parent has been throttled and cfs_rq removed from the
- * list. Add it back to not break the leaf list.
- */
- if (throttled_hierarchy(cfs_rq))
- list_add_leaf_cfs_rq(cfs_rq);
+ list_add_leaf_cfs_rq(cfs_rq);
}
/* At this point se is NULL and we are at root level*/
