diff options
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 2 | ||||
| -rw-r--r-- | kernel/sched/fair.c | 25 |
2 files changed, 1 insertions, 26 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 89c5ae836f666..0c3feebcf1128 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -1731,7 +1731,6 @@ static void __sched_fork(unsigned long clone_flags, struct task_struct *p) p->node_stamp = 0ULL; p->numa_scan_seq = p->mm ? p->mm->numa_scan_seq : 0; - p->numa_migrate_seq = 1; p->numa_scan_period = sysctl_numa_balancing_scan_delay; p->numa_work.next = &p->numa_work; p->numa_faults = NULL; @@ -4488,7 +4487,6 @@ void sched_setnuma(struct task_struct *p, int nid) p->sched_class->put_prev_task(rq, p); p->numa_preferred_nid = nid; - p->numa_migrate_seq = 1; if (running) p->sched_class->set_curr_task(rq); diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index da6fa22be000f..8454c38b1b12f 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1261,16 +1261,8 @@ static void numa_migrate_preferred(struct task_struct *p) { /* Success if task is already running on preferred CPU */ p->numa_migrate_retry = 0; - if (cpu_to_node(task_cpu(p)) == p->numa_preferred_nid) { - /* - * If migration is temporarily disabled due to a task migration - * then re-enable it now as the task is running on its - * preferred node and memory should migrate locally - */ - if (!p->numa_migrate_seq) - p->numa_migrate_seq++; + if (cpu_to_node(task_cpu(p)) == p->numa_preferred_nid) return; - } /* This task has no NUMA fault statistics yet */ if (unlikely(p->numa_preferred_nid == -1)) @@ -1367,7 +1359,6 @@ static void task_numa_placement(struct task_struct *p) if (p->numa_scan_seq == seq) return; p->numa_scan_seq = seq; - p->numa_migrate_seq++; p->numa_scan_period_max = task_scan_max(p); /* If the task is part of a group prevent parallel updates to group stats */ @@ -4730,20 +4721,6 @@ static void move_task(struct task_struct *p, struct lb_env *env) set_task_cpu(p, env->dst_cpu); activate_task(env->dst_rq, p, 0); check_preempt_curr(env->dst_rq, p, 0); -#ifdef CONFIG_NUMA_BALANCING - if (p->numa_preferred_nid != -1) { - int src_nid = cpu_to_node(env->src_cpu); - int dst_nid = cpu_to_node(env->dst_cpu); - - /* - * If the load balancer has moved the task then limit - * migrations from taking place in the short term in - * case this is a short-lived migration. - */ - if (src_nid != dst_nid && dst_nid != p->numa_preferred_nid) - p->numa_migrate_seq = 0; - } -#endif } /* |