diff options
Diffstat (limited to 'kernel/sched/fair.c')
| -rw-r--r-- | kernel/sched/fair.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 968ffee24721..cf86f74bcac2 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -3828,7 +3828,8 @@ static inline void update_sg_lb_stats(struct sched_domain *sd, */ if (local_group) { if (idle != CPU_NEWLY_IDLE) { - if (balance_cpu != this_cpu) { + if (balance_cpu != this_cpu || + cmpxchg(&group->balance_cpu, -1, balance_cpu) != -1) { *balance = 0; return; } @@ -4929,7 +4930,7 @@ static void rebalance_domains(int cpu, enum cpu_idle_type idle) int balance = 1; struct rq *rq = cpu_rq(cpu); unsigned long interval; - struct sched_domain *sd; + struct sched_domain *sd, *last = NULL; /* Earliest time when we have to do rebalance again */ unsigned long next_balance = jiffies + 60*HZ; int update_next_balance = 0; @@ -4939,6 +4940,7 @@ static void rebalance_domains(int cpu, enum cpu_idle_type idle) rcu_read_lock(); for_each_domain(cpu, sd) { + last = sd; if (!(sd->flags & SD_LOAD_BALANCE)) continue; @@ -4983,6 +4985,9 @@ out: if (!balance) break; } + for (sd = last; sd; sd = sd->child) + (void)cmpxchg(&sd->groups->balance_cpu, cpu, -1); + rcu_read_unlock(); /* |