[powerpc][next-20210621] WARNING at kernel/sched/fair.c:3277 during boot

[Odin Ugedal]

Hi,

Wouldn't the attached diff below also help when load is removed,
Vincent? Isn't there a theoretical chance that x_sum ends up at zero
while x_load ends up as a positive value (without this patch)? Can
post as a separate patch if it works for Sachin.


diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index bfaa6e1f6067..def48bc2e90b 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -3688,15 +3688,15 @@ update_cfs_rq_load_avg(u64 now, struct cfs_rq *cfs_rq)

                r = removed_load;
                sub_positive(&sa->load_avg, r);
-               sub_positive(&sa->load_sum, r * divider);
+               sa->load_sum = sa->load_avg * divider;

                r = removed_util;
                sub_positive(&sa->util_avg, r);
-               sub_positive(&sa->util_sum, r * divider);
+               sa->util_sum = sa->util_avg * divider;

                r = removed_runnable;
                sub_positive(&sa->runnable_avg, r);
-               sub_positive(&sa->runnable_sum, r * divider);
+               sa->runnable_sum = sa->runnable_avg * divider;

                /*
                 * removed_runnable is the unweighted version of
removed_load so we