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sched/fair: Also gate overloaded status update for SD_ASYM_CPUCAPACITY

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The argument sg_overloaded of update_sg_lb_stats() is only consumed when
balancing at the root domain. It only makes sense to update it in such a
case. Commit 3229adbe78 ("sched/fair: Do not compute overloaded status
unnecessarily during lb") updated the logic accordingly but missed the case
in which the root domain has the SD_ASYM_CPUCAPACITY flag. Fix this.

Fixes: 3229adbe78 ("sched/fair: Do not compute overloaded status unnecessarily during lb")
Reported-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org>
Tested-by: Christian Loehle <christian.loehle@arm.com>
Tested-by: Andrea Righi <arighi@nvidia.com>
Link: https://patch.msgid.link/20260720-rneri-fix-cas-clusters-v6-2-bb500bf4afd4@linux.intel.com
This commit is contained in:
Ricardo Neri 2026-07-20 19:43:18 -07:00 committed by Peter Zijlstra
parent 180ff97c18
commit 6060d61d13
1 changed files with 3 additions and 1 deletions
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4
kernel/sched/fair.c
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@ -11973,7 +11973,9 @@ static inline void update_sg_lb_stats(struct lb_env *env,
/* Check for a misfit task on the cpu */
if (sgs->group_misfit_task_load < rq->misfit_task_load) {
sgs->group_misfit_task_load = rq->misfit_task_load;
*sg_overloaded = 1;
if (balancing_at_rd)
*sg_overloaded = 1;
}
} else if (env->idle && sched_reduced_capacity(rq, env->sd)) {
/* Check for a task running on a CPU with reduced capacity */