diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/fair.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index bebc8367edee..fe40cdb8e640 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -4779,6 +4779,11 @@ static inline bool task_fits_spare(struct task_struct *p, int cpu) return __task_fits(p, cpu, cpu_util(cpu)); } +static bool cpu_overutilized(int cpu) +{ + return (capacity_of(cpu) * 1024) < (cpu_util(cpu) * capacity_margin); +} + /* * find_idlest_group finds and returns the least busy CPU group within the * domain. @@ -6995,6 +7000,13 @@ static int need_active_balance(struct lb_env *env) return 1; } + if ((capacity_of(env->src_cpu) < capacity_of(env->dst_cpu)) && + env->src_rq->cfs.h_nr_running == 1 && + cpu_overutilized(env->src_cpu) && + !cpu_overutilized(env->dst_cpu)) { + return 1; + } + return unlikely(sd->nr_balance_failed > sd->cache_nice_tries+2); } |