sched/fair: Propagate load for throttled cfs_rq

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Before task based throttle model, propagating load will stop at a
throttled cfs_rq and that propagate will happen on unthrottle time by
update_load_avg().

Now that there is no update_load_avg() on unthrottle for throttled
cfs_rq and all load tracking is done by task related operations, let the
propagate happen immediately.

While at it, add a comment to explain why cfs_rqs that are not affected
by throttle have to be added to leaf cfs_rq list in
propagate_entity_cfs_rq() per my understanding of commit 0258bdfaff
("sched/fair: Fix unfairness caused by missing load decay").

Signed-off-by: Aaron Lu <ziqianlu@bytedance.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Chengming Zhou <chengming.zhou@linux.dev>

...

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Aaron Lu 2025-09-10 17:50:41 +08:00 • committed by Peter Zijlstra

parent 5b726e9bf9

commit fe8d238e64

1 changed files with 18 additions and 8 deletions

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kernel/sched/fair.c

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