diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 6cd5133f0c2a..fa43ce3962e7 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -880,6 +880,19 @@ uclamp_eff_get(struct task_struct *p, unsigned int clamp_id) return uc_req; } +unsigned int uclamp_eff_value(struct task_struct *p, unsigned int clamp_id) +{ + struct uclamp_se uc_eff; + + /* Task currently refcounted: use back-annotated (effective) value */ + if (p->uclamp[clamp_id].active) + return p->uclamp[clamp_id].value; + + uc_eff = uclamp_eff_get(p, clamp_id); + + return uc_eff.value; +} + /* * When a task is enqueued on a rq, the clamp bucket currently defined by the * task's uclamp::bucket_id is refcounted on that rq. This also immediately diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 9b0c77a99346..1783f6b4c2e0 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -2266,11 +2266,20 @@ static inline void cpufreq_update_util(struct rq *rq, unsigned int flags) {} #endif /* CONFIG_CPU_FREQ */ #ifdef CONFIG_UCLAMP_TASK -static inline unsigned int uclamp_util(struct rq *rq, unsigned int util) +unsigned int uclamp_eff_value(struct task_struct *p, unsigned int clamp_id); + +static __always_inline +unsigned int uclamp_util_with(struct rq *rq, unsigned int util, + struct task_struct *p) { unsigned int min_util = READ_ONCE(rq->uclamp[UCLAMP_MIN].value); unsigned int max_util = READ_ONCE(rq->uclamp[UCLAMP_MAX].value); + if (p) { + min_util = max(min_util, uclamp_eff_value(p, UCLAMP_MIN)); + max_util = max(max_util, uclamp_eff_value(p, UCLAMP_MAX)); + } + /* * Since CPU's {min,max}_util clamps are MAX aggregated considering * RUNNABLE tasks with _different_ clamps, we can end up with an @@ -2281,7 +2290,17 @@ static inline unsigned int uclamp_util(struct rq *rq, unsigned int util) return clamp(util, min_util, max_util); } + +static inline unsigned int uclamp_util(struct rq *rq, unsigned int util) +{ + return uclamp_util_with(rq, util, NULL); +} #else /* CONFIG_UCLAMP_TASK */ +static inline unsigned int uclamp_util_with(struct rq *rq, unsigned int util, + struct task_struct *p) +{ + return util; +} static inline unsigned int uclamp_util(struct rq *rq, unsigned int util) { return util;