diff options
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 863964fbcfd2..c5197338ac47 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -157,12 +157,36 @@ static inline int task_has_dl_policy(struct task_struct *p) } /* + * !! For sched_setattr_nocheck() (kernel) only !! + * + * This is actually gross. :( + * + * It is used to make schedutil kworker(s) higher priority than SCHED_DEADLINE + * tasks, but still be able to sleep. We need this on platforms that cannot + * atomically change clock frequency. Remove once fast switching will be + * available on such platforms. + * + * SUGOV stands for SchedUtil GOVernor. + */ +#define SCHED_FLAG_SUGOV 0x10000000 + +static inline bool dl_entity_is_special(struct sched_dl_entity *dl_se) +{ +#ifdef CONFIG_CPU_FREQ_GOV_SCHEDUTIL + return unlikely(dl_se->flags & SCHED_FLAG_SUGOV); +#else + return false; +#endif +} + +/* * Tells if entity @a should preempt entity @b. */ static inline bool dl_entity_preempt(struct sched_dl_entity *a, struct sched_dl_entity *b) { - return dl_time_before(a->deadline, b->deadline); + return dl_entity_is_special(a) || + dl_time_before(a->deadline, b->deadline); } /* @@ -2085,6 +2109,8 @@ static inline void cpufreq_update_util(struct rq *rq, unsigned int flags) {} #define arch_scale_freq_invariant() (false) #endif +#ifdef CONFIG_CPU_FREQ_GOV_SCHEDUTIL + static inline unsigned long cpu_util_dl(struct rq *rq) { return (rq->dl.running_bw * SCHED_CAPACITY_SCALE) >> BW_SHIFT; @@ -2094,3 +2120,5 @@ static inline unsigned long cpu_util_cfs(struct rq *rq) { return rq->cfs.avg.util_avg; } + +#endif |