Lines Matching refs:env
2115 static void update_numa_stats(struct task_numa_env *env, in update_numa_stats() argument
2136 !cpumask_test_cpu(cpu, env->p->cpus_ptr)) in update_numa_stats()
2149 ns->node_type = numa_classify(env->imbalance_pct, ns); in update_numa_stats()
2155 static void task_numa_assign(struct task_numa_env *env, in task_numa_assign() argument
2158 struct rq *rq = cpu_rq(env->dst_cpu); in task_numa_assign()
2161 if (env->best_cpu != env->dst_cpu && xchg(&rq->numa_migrate_on, 1)) { in task_numa_assign()
2163 int start = env->dst_cpu; in task_numa_assign()
2166 for_each_cpu_wrap(cpu, cpumask_of_node(env->dst_nid), start + 1) { in task_numa_assign()
2167 if (cpu == env->best_cpu || !idle_cpu(cpu) || in task_numa_assign()
2168 !cpumask_test_cpu(cpu, env->p->cpus_ptr)) { in task_numa_assign()
2172 env->dst_cpu = cpu; in task_numa_assign()
2173 rq = cpu_rq(env->dst_cpu); in task_numa_assign()
2187 if (env->best_cpu != -1 && env->best_cpu != env->dst_cpu) { in task_numa_assign()
2188 rq = cpu_rq(env->best_cpu); in task_numa_assign()
2192 if (env->best_task) in task_numa_assign()
2193 put_task_struct(env->best_task); in task_numa_assign()
2197 env->best_task = p; in task_numa_assign()
2198 env->best_imp = imp; in task_numa_assign()
2199 env->best_cpu = env->dst_cpu; in task_numa_assign()
2203 struct task_numa_env *env) in load_too_imbalanced() argument
2216 src_capacity = env->src_stats.compute_capacity; in load_too_imbalanced()
2217 dst_capacity = env->dst_stats.compute_capacity; in load_too_imbalanced()
2221 orig_src_load = env->src_stats.load; in load_too_imbalanced()
2222 orig_dst_load = env->dst_stats.load; in load_too_imbalanced()
2243 static bool task_numa_compare(struct task_numa_env *env, in task_numa_compare() argument
2246 struct numa_group *cur_ng, *p_ng = deref_curr_numa_group(env->p); in task_numa_compare()
2247 struct rq *dst_rq = cpu_rq(env->dst_cpu); in task_numa_compare()
2251 int dist = env->dist; in task_numa_compare()
2268 if (cur == env->p) { in task_numa_compare()
2274 if (maymove && moveimp >= env->best_imp) in task_numa_compare()
2281 if (!cpumask_test_cpu(env->src_cpu, cur->cpus_ptr)) in task_numa_compare()
2288 if (env->best_task && in task_numa_compare()
2289 env->best_task->numa_preferred_nid == env->src_nid && in task_numa_compare()
2290 cur->numa_preferred_nid != env->src_nid) { in task_numa_compare()
2312 if (env->dst_stats.node_type == node_has_spare) in task_numa_compare()
2315 imp = taskimp + task_weight(cur, env->src_nid, dist) - in task_numa_compare()
2316 task_weight(cur, env->dst_nid, dist); in task_numa_compare()
2329 imp += group_weight(cur, env->src_nid, dist) - in task_numa_compare()
2330 group_weight(cur, env->dst_nid, dist); in task_numa_compare()
2332 imp += task_weight(cur, env->src_nid, dist) - in task_numa_compare()
2333 task_weight(cur, env->dst_nid, dist); in task_numa_compare()
2337 if (cur->numa_preferred_nid == env->dst_nid) in task_numa_compare()
2346 if (cur->numa_preferred_nid == env->src_nid) in task_numa_compare()
2349 if (maymove && moveimp > imp && moveimp > env->best_imp) { in task_numa_compare()
2359 if (env->best_task && cur->numa_preferred_nid == env->src_nid && in task_numa_compare()
2360 env->best_task->numa_preferred_nid != env->src_nid) { in task_numa_compare()
2370 if (imp < SMALLIMP || imp <= env->best_imp + SMALLIMP / 2) in task_numa_compare()
2376 load = task_h_load(env->p) - task_h_load(cur); in task_numa_compare()
2380 dst_load = env->dst_stats.load + load; in task_numa_compare()
2381 src_load = env->src_stats.load - load; in task_numa_compare()
2383 if (load_too_imbalanced(src_load, dst_load, env)) in task_numa_compare()
2389 int cpu = env->dst_stats.idle_cpu; in task_numa_compare()
2393 cpu = env->dst_cpu; in task_numa_compare()
2399 if (!idle_cpu(cpu) && env->best_cpu >= 0 && in task_numa_compare()
2400 idle_cpu(env->best_cpu)) { in task_numa_compare()
2401 cpu = env->best_cpu; in task_numa_compare()
2404 env->dst_cpu = cpu; in task_numa_compare()
2407 task_numa_assign(env, cur, imp); in task_numa_compare()
2414 if (maymove && !cur && env->best_cpu >= 0 && idle_cpu(env->best_cpu)) in task_numa_compare()
2421 if (!maymove && env->best_task && in task_numa_compare()
2422 env->best_task->numa_preferred_nid == env->src_nid) { in task_numa_compare()
2431 static void task_numa_find_cpu(struct task_numa_env *env, in task_numa_find_cpu() argument
2441 if (env->dst_stats.node_type == node_has_spare) { in task_numa_find_cpu()
2451 src_running = env->src_stats.nr_running - 1; in task_numa_find_cpu()
2452 dst_running = env->dst_stats.nr_running + 1; in task_numa_find_cpu()
2455 env->imb_numa_nr); in task_numa_find_cpu()
2460 if (env->dst_stats.idle_cpu >= 0) { in task_numa_find_cpu()
2461 env->dst_cpu = env->dst_stats.idle_cpu; in task_numa_find_cpu()
2462 task_numa_assign(env, NULL, 0); in task_numa_find_cpu()
2472 load = task_h_load(env->p); in task_numa_find_cpu()
2473 dst_load = env->dst_stats.load + load; in task_numa_find_cpu()
2474 src_load = env->src_stats.load - load; in task_numa_find_cpu()
2475 maymove = !load_too_imbalanced(src_load, dst_load, env); in task_numa_find_cpu()
2478 for_each_cpu(cpu, cpumask_of_node(env->dst_nid)) { in task_numa_find_cpu()
2480 if (!cpumask_test_cpu(cpu, env->p->cpus_ptr)) in task_numa_find_cpu()
2483 env->dst_cpu = cpu; in task_numa_find_cpu()
2484 if (task_numa_compare(env, taskimp, groupimp, maymove)) in task_numa_find_cpu()
2491 struct task_numa_env env = { in task_numa_migrate() local
2519 sd = rcu_dereference(per_cpu(sd_numa, env.src_cpu)); in task_numa_migrate()
2521 env.imbalance_pct = 100 + (sd->imbalance_pct - 100) / 2; in task_numa_migrate()
2522 env.imb_numa_nr = sd->imb_numa_nr; in task_numa_migrate()
2537 env.dst_nid = p->numa_preferred_nid; in task_numa_migrate()
2538 dist = env.dist = node_distance(env.src_nid, env.dst_nid); in task_numa_migrate()
2539 taskweight = task_weight(p, env.src_nid, dist); in task_numa_migrate()
2540 groupweight = group_weight(p, env.src_nid, dist); in task_numa_migrate()
2541 update_numa_stats(&env, &env.src_stats, env.src_nid, false); in task_numa_migrate()
2542 taskimp = task_weight(p, env.dst_nid, dist) - taskweight; in task_numa_migrate()
2543 groupimp = group_weight(p, env.dst_nid, dist) - groupweight; in task_numa_migrate()
2544 update_numa_stats(&env, &env.dst_stats, env.dst_nid, true); in task_numa_migrate()
2547 task_numa_find_cpu(&env, taskimp, groupimp); in task_numa_migrate()
2557 if (env.best_cpu == -1 || (ng && ng->active_nodes > 1)) { in task_numa_migrate()
2559 if (nid == env.src_nid || nid == p->numa_preferred_nid) in task_numa_migrate()
2562 dist = node_distance(env.src_nid, env.dst_nid); in task_numa_migrate()
2564 dist != env.dist) { in task_numa_migrate()
2565 taskweight = task_weight(p, env.src_nid, dist); in task_numa_migrate()
2566 groupweight = group_weight(p, env.src_nid, dist); in task_numa_migrate()
2575 env.dist = dist; in task_numa_migrate()
2576 env.dst_nid = nid; in task_numa_migrate()
2577 update_numa_stats(&env, &env.dst_stats, env.dst_nid, true); in task_numa_migrate()
2578 task_numa_find_cpu(&env, taskimp, groupimp); in task_numa_migrate()
2591 if (env.best_cpu == -1) in task_numa_migrate()
2592 nid = env.src_nid; in task_numa_migrate()
2594 nid = cpu_to_node(env.best_cpu); in task_numa_migrate()
2601 if (env.best_cpu == -1) { in task_numa_migrate()
2602 trace_sched_stick_numa(p, env.src_cpu, NULL, -1); in task_numa_migrate()
2606 best_rq = cpu_rq(env.best_cpu); in task_numa_migrate()
2607 if (env.best_task == NULL) { in task_numa_migrate()
2608 ret = migrate_task_to(p, env.best_cpu); in task_numa_migrate()
2611 trace_sched_stick_numa(p, env.src_cpu, NULL, env.best_cpu); in task_numa_migrate()
2615 ret = migrate_swap(p, env.best_task, env.best_cpu, env.src_cpu); in task_numa_migrate()
2619 trace_sched_stick_numa(p, env.src_cpu, env.best_task, env.best_cpu); in task_numa_migrate()
2620 put_task_struct(env.best_task); in task_numa_migrate()
9260 static int task_hot(struct task_struct *p, struct lb_env *env) in task_hot() argument
9264 lockdep_assert_rq_held(env->src_rq); in task_hot()
9273 if (env->sd->flags & SD_SHARE_CPUCAPACITY) in task_hot()
9279 if (sched_feat(CACHE_HOT_BUDDY) && env->dst_rq->nr_running && in task_hot()
9290 if (!sched_core_cookie_match(cpu_rq(env->dst_cpu), p)) in task_hot()
9296 delta = rq_clock_task(env->src_rq) - p->se.exec_start; in task_hot()
9307 static int migrate_degrades_locality(struct task_struct *p, struct lb_env *env) in migrate_degrades_locality() argument
9316 if (!p->numa_faults || !(env->sd->flags & SD_NUMA)) in migrate_degrades_locality()
9319 src_nid = cpu_to_node(env->src_cpu); in migrate_degrades_locality()
9320 dst_nid = cpu_to_node(env->dst_cpu); in migrate_degrades_locality()
9327 if (env->src_rq->nr_running > env->src_rq->nr_preferred_running) in migrate_degrades_locality()
9338 if (env->idle == CPU_IDLE) in migrate_degrades_locality()
9355 struct lb_env *env) in migrate_degrades_locality() argument
9365 int can_migrate_task(struct task_struct *p, struct lb_env *env) in can_migrate_task() argument
9369 lockdep_assert_rq_held(env->src_rq); in can_migrate_task()
9378 if (throttled_lb_pair(task_group(p), env->src_cpu, env->dst_cpu)) in can_migrate_task()
9385 if (!cpumask_test_cpu(env->dst_cpu, p->cpus_ptr)) { in can_migrate_task()
9390 env->flags |= LBF_SOME_PINNED; in can_migrate_task()
9402 if (env->idle == CPU_NEWLY_IDLE || in can_migrate_task()
9403 env->flags & (LBF_DST_PINNED | LBF_ACTIVE_LB)) in can_migrate_task()
9407 for_each_cpu_and(cpu, env->dst_grpmask, env->cpus) { in can_migrate_task()
9409 env->flags |= LBF_DST_PINNED; in can_migrate_task()
9410 env->new_dst_cpu = cpu; in can_migrate_task()
9419 env->flags &= ~LBF_ALL_PINNED; in can_migrate_task()
9421 if (task_on_cpu(env->src_rq, p)) { in can_migrate_task()
9433 if (env->flags & LBF_ACTIVE_LB) in can_migrate_task()
9436 tsk_cache_hot = migrate_degrades_locality(p, env); in can_migrate_task()
9438 tsk_cache_hot = task_hot(p, env); in can_migrate_task()
9441 env->sd->nr_balance_failed > env->sd->cache_nice_tries) { in can_migrate_task()
9443 schedstat_inc(env->sd->lb_hot_gained[env->idle]); in can_migrate_task()
9456 static void detach_task(struct task_struct *p, struct lb_env *env) in detach_task() argument
9458 lockdep_assert_rq_held(env->src_rq); in detach_task()
9460 deactivate_task(env->src_rq, p, DEQUEUE_NOCLOCK); in detach_task()
9461 set_task_cpu(p, env->dst_cpu); in detach_task()
9470 static struct task_struct *detach_one_task(struct lb_env *env) in detach_one_task() argument
9474 lockdep_assert_rq_held(env->src_rq); in detach_one_task()
9477 &env->src_rq->cfs_tasks, se.group_node) { in detach_one_task()
9478 if (!can_migrate_task(p, env)) in detach_one_task()
9481 detach_task(p, env); in detach_one_task()
9489 schedstat_inc(env->sd->lb_gained[env->idle]); in detach_one_task()
9501 static int detach_tasks(struct lb_env *env) in detach_tasks() argument
9503 struct list_head *tasks = &env->src_rq->cfs_tasks; in detach_tasks()
9508 lockdep_assert_rq_held(env->src_rq); in detach_tasks()
9514 if (env->src_rq->nr_running <= 1) { in detach_tasks()
9515 env->flags &= ~LBF_ALL_PINNED; in detach_tasks()
9519 if (env->imbalance <= 0) in detach_tasks()
9527 if (env->idle && env->src_rq->nr_running <= 1) in detach_tasks()
9530 env->loop++; in detach_tasks()
9532 if (env->loop > env->loop_max) in detach_tasks()
9536 if (env->loop > env->loop_break) { in detach_tasks()
9537 env->loop_break += SCHED_NR_MIGRATE_BREAK; in detach_tasks()
9538 env->flags |= LBF_NEED_BREAK; in detach_tasks()
9544 if (!can_migrate_task(p, env)) in detach_tasks()
9547 switch (env->migration_type) { in detach_tasks()
9559 load < 16 && !env->sd->nr_balance_failed) in detach_tasks()
9568 if (shr_bound(load, env->sd->nr_balance_failed) > env->imbalance) in detach_tasks()
9571 env->imbalance -= load; in detach_tasks()
9577 if (shr_bound(util, env->sd->nr_balance_failed) > env->imbalance) in detach_tasks()
9580 env->imbalance -= util; in detach_tasks()
9584 env->imbalance--; in detach_tasks()
9589 if (task_fits_cpu(p, env->src_cpu)) in detach_tasks()
9592 env->imbalance = 0; in detach_tasks()
9596 detach_task(p, env); in detach_tasks()
9597 list_add(&p->se.group_node, &env->tasks); in detach_tasks()
9607 if (env->idle == CPU_NEWLY_IDLE) in detach_tasks()
9615 if (env->imbalance <= 0) in detach_tasks()
9628 schedstat_add(env->sd->lb_gained[env->idle], detached); in detach_tasks()
9663 static void attach_tasks(struct lb_env *env) in attach_tasks() argument
9665 struct list_head *tasks = &env->tasks; in attach_tasks()
9669 rq_lock(env->dst_rq, &rf); in attach_tasks()
9670 update_rq_clock(env->dst_rq); in attach_tasks()
9676 attach_task(env->dst_rq, p); in attach_tasks()
9679 rq_unlock(env->dst_rq, &rf); in attach_tasks()
10209 sched_group_asym(struct lb_env *env, struct sg_lb_stats *sgs, struct sched_group *group) in sched_group_asym() argument
10219 return sched_asym(env->sd, env->dst_cpu, group->asym_prefer_cpu); in sched_group_asym()
10233 static inline bool smt_balance(struct lb_env *env, struct sg_lb_stats *sgs, in smt_balance() argument
10236 if (!env->idle) in smt_balance()
10252 static inline long sibling_imbalance(struct lb_env *env, in sibling_imbalance() argument
10260 if (!env->idle || !busiest->sum_nr_running) in sibling_imbalance()
10309 static inline void update_sg_lb_stats(struct lb_env *env, in update_sg_lb_stats() argument
10322 for_each_cpu_and(i, sched_group_span(group), env->cpus) { in update_sg_lb_stats()
10356 if (env->sd->flags & SD_ASYM_CPUCAPACITY) { in update_sg_lb_stats()
10362 } else if (env->idle && sched_reduced_capacity(rq, env->sd)) { in update_sg_lb_stats()
10374 if (!local_group && env->idle && sgs->sum_h_nr_running && in update_sg_lb_stats()
10375 sched_group_asym(env, sgs, group)) in update_sg_lb_stats()
10379 if (!local_group && smt_balance(env, sgs, group)) in update_sg_lb_stats()
10382 sgs->group_type = group_classify(env->sd->imbalance_pct, group, sgs); in update_sg_lb_stats()
10403 static bool update_sd_pick_busiest(struct lb_env *env, in update_sd_pick_busiest() argument
10420 if ((env->sd->flags & SD_ASYM_CPUCAPACITY) && in update_sd_pick_busiest()
10422 (!capacity_greater(capacity_of(env->dst_cpu), sg->sgc->max_capacity) || in update_sd_pick_busiest()
10533 if ((env->sd->flags & SD_ASYM_CPUCAPACITY) && in update_sd_pick_busiest()
10535 (capacity_greater(sg->sgc->min_capacity, capacity_of(env->dst_cpu)))) in update_sd_pick_busiest()
10903 static void update_idle_cpu_scan(struct lb_env *env, in update_idle_cpu_scan() argument
10917 if (!sched_feat(SIS_UTIL) || env->idle == CPU_NEWLY_IDLE) in update_idle_cpu_scan()
10920 llc_weight = per_cpu(sd_llc_size, env->dst_cpu); in update_idle_cpu_scan()
10921 if (env->sd->span_weight != llc_weight) in update_idle_cpu_scan()
10924 sd_share = rcu_dereference(per_cpu(sd_llc_shared, env->dst_cpu)); in update_idle_cpu_scan()
10961 pct = env->sd->imbalance_pct; in update_idle_cpu_scan()
10980 static inline void update_sd_lb_stats(struct lb_env *env, struct sd_lb_stats *sds) in update_sd_lb_stats() argument
10982 struct sched_group *sg = env->sd->groups; in update_sd_lb_stats()
10992 local_group = cpumask_test_cpu(env->dst_cpu, sched_group_span(sg)); in update_sd_lb_stats()
10997 if (env->idle != CPU_NEWLY_IDLE || in update_sd_lb_stats()
10999 update_group_capacity(env->sd, env->dst_cpu); in update_sd_lb_stats()
11002 update_sg_lb_stats(env, sds, sg, sgs, &sg_overloaded, &sg_overutilized); in update_sd_lb_stats()
11004 if (!local_group && update_sd_pick_busiest(env, sds, sg, sgs)) { in update_sd_lb_stats()
11015 } while (sg != env->sd->groups); in update_sd_lb_stats()
11026 if (env->sd->flags & SD_NUMA) in update_sd_lb_stats()
11027 env->fbq_type = fbq_classify_group(&sds->busiest_stat); in update_sd_lb_stats()
11029 if (!env->sd->parent) { in update_sd_lb_stats()
11031 set_rd_overloaded(env->dst_rq->rd, sg_overloaded); in update_sd_lb_stats()
11034 set_rd_overutilized(env->dst_rq->rd, sg_overutilized); in update_sd_lb_stats()
11036 set_rd_overutilized(env->dst_rq->rd, sg_overutilized); in update_sd_lb_stats()
11039 update_idle_cpu_scan(env, sum_util); in update_sd_lb_stats()
11048 static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *sds) in calculate_imbalance() argument
11056 if (env->sd->flags & SD_ASYM_CPUCAPACITY) { in calculate_imbalance()
11058 env->migration_type = migrate_misfit; in calculate_imbalance()
11059 env->imbalance = 1; in calculate_imbalance()
11065 env->migration_type = migrate_load; in calculate_imbalance()
11066 env->imbalance = busiest->group_misfit_task_load; in calculate_imbalance()
11076 env->migration_type = migrate_task; in calculate_imbalance()
11077 env->imbalance = busiest->sum_h_nr_running; in calculate_imbalance()
11083 env->migration_type = migrate_task; in calculate_imbalance()
11084 env->imbalance = 1; in calculate_imbalance()
11095 env->migration_type = migrate_task; in calculate_imbalance()
11096 env->imbalance = 1; in calculate_imbalance()
11106 !(env->sd->flags & SD_SHARE_LLC)) { in calculate_imbalance()
11115 env->migration_type = migrate_util; in calculate_imbalance()
11116 env->imbalance = max(local->group_capacity, local->group_util) - in calculate_imbalance()
11126 if (env->idle && env->imbalance == 0) { in calculate_imbalance()
11127 env->migration_type = migrate_task; in calculate_imbalance()
11128 env->imbalance = 1; in calculate_imbalance()
11139 env->migration_type = migrate_task; in calculate_imbalance()
11140 env->imbalance = sibling_imbalance(env, sds, busiest, local); in calculate_imbalance()
11147 env->migration_type = migrate_task; in calculate_imbalance()
11148 env->imbalance = max_t(long, 0, in calculate_imbalance()
11154 if (env->sd->flags & SD_NUMA) { in calculate_imbalance()
11155 env->imbalance = adjust_numa_imbalance(env->imbalance, in calculate_imbalance()
11157 env->sd->imb_numa_nr); in calculate_imbalance()
11162 env->imbalance >>= 1; in calculate_imbalance()
11185 env->imbalance = 0; in calculate_imbalance()
11197 env->imbalance = 0; in calculate_imbalance()
11211 env->migration_type = migrate_load; in calculate_imbalance()
11212 env->imbalance = min( in calculate_imbalance()
11250 static struct sched_group *sched_balance_find_src_group(struct lb_env *env) in sched_balance_find_src_group() argument
11261 update_sd_lb_stats(env, &sds); in sched_balance_find_src_group()
11273 if (!is_rd_overutilized(env->dst_rq->rd) && in sched_balance_find_src_group()
11274 rcu_dereference(env->dst_rq->rd->pd)) in sched_balance_find_src_group()
11325 env->sd->imbalance_pct * local->avg_load) in sched_balance_find_src_group()
11334 sibling_imbalance(env, &sds, busiest, local) > 1) in sched_balance_find_src_group()
11338 if (!env->idle) { in sched_balance_find_src_group()
11377 calculate_imbalance(env, &sds); in sched_balance_find_src_group()
11378 return env->imbalance ? sds.busiest : NULL; in sched_balance_find_src_group()
11381 env->imbalance = 0; in sched_balance_find_src_group()
11388 static struct rq *sched_balance_find_src_rq(struct lb_env *env, in sched_balance_find_src_rq() argument
11396 for_each_cpu_and(i, sched_group_span(group), env->cpus) { in sched_balance_find_src_rq()
11423 if (rt > env->fbq_type) in sched_balance_find_src_rq()
11438 if (env->sd->flags & SD_ASYM_CPUCAPACITY && in sched_balance_find_src_rq()
11439 !capacity_greater(capacity_of(env->dst_cpu), capacity) && in sched_balance_find_src_rq()
11450 if (sched_asym(env->sd, i, env->dst_cpu) && nr_running == 1) in sched_balance_find_src_rq()
11453 switch (env->migration_type) { in sched_balance_find_src_rq()
11461 if (nr_running == 1 && load > env->imbalance && in sched_balance_find_src_rq()
11462 !check_cpu_capacity(rq, env->sd)) in sched_balance_find_src_rq()
11534 asym_active_balance(struct lb_env *env) in asym_active_balance() argument
11546 return env->idle && sched_use_asym_prio(env->sd, env->dst_cpu) && in asym_active_balance()
11547 (sched_asym_prefer(env->dst_cpu, env->src_cpu) || in asym_active_balance()
11548 !sched_use_asym_prio(env->sd, env->src_cpu)); in asym_active_balance()
11552 imbalanced_active_balance(struct lb_env *env) in imbalanced_active_balance() argument
11554 struct sched_domain *sd = env->sd; in imbalanced_active_balance()
11561 if ((env->migration_type == migrate_task) && in imbalanced_active_balance()
11568 static int need_active_balance(struct lb_env *env) in need_active_balance() argument
11570 struct sched_domain *sd = env->sd; in need_active_balance()
11572 if (asym_active_balance(env)) in need_active_balance()
11575 if (imbalanced_active_balance(env)) in need_active_balance()
11584 if (env->idle && in need_active_balance()
11585 (env->src_rq->cfs.h_nr_running == 1)) { in need_active_balance()
11586 if ((check_cpu_capacity(env->src_rq, sd)) && in need_active_balance()
11587 (capacity_of(env->src_cpu)*sd->imbalance_pct < capacity_of(env->dst_cpu)*100)) in need_active_balance()
11591 if (env->migration_type == migrate_misfit) in need_active_balance()
11599 static int should_we_balance(struct lb_env *env) in should_we_balance() argument
11602 struct sched_group *sg = env->sd->groups; in should_we_balance()
11609 if (!cpumask_test_cpu(env->dst_cpu, env->cpus)) in should_we_balance()
11619 if (env->idle == CPU_NEWLY_IDLE) { in should_we_balance()
11620 if (env->dst_rq->nr_running > 0 || env->dst_rq->ttwu_pending) in should_we_balance()
11627 for_each_cpu_and(cpu, swb_cpus, env->cpus) { in should_we_balance()
11636 if (!(env->sd->flags & SD_SHARE_CPUCAPACITY) && !is_core_idle(cpu)) { in should_we_balance()
11654 return cpu == env->dst_cpu; in should_we_balance()
11659 return idle_smt == env->dst_cpu; in should_we_balance()
11662 return group_balance_cpu(sg) == env->dst_cpu; in should_we_balance()
11679 struct lb_env env = { in sched_balance_rq() local
11688 .tasks = LIST_HEAD_INIT(env.tasks), in sched_balance_rq()
11696 if (!should_we_balance(&env)) { in sched_balance_rq()
11701 group = sched_balance_find_src_group(&env); in sched_balance_rq()
11707 busiest = sched_balance_find_src_rq(&env, group); in sched_balance_rq()
11713 WARN_ON_ONCE(busiest == env.dst_rq); in sched_balance_rq()
11715 schedstat_add(sd->lb_imbalance[idle], env.imbalance); in sched_balance_rq()
11717 env.src_cpu = busiest->cpu; in sched_balance_rq()
11718 env.src_rq = busiest; in sched_balance_rq()
11722 env.flags |= LBF_ALL_PINNED; in sched_balance_rq()
11730 env.loop_max = min(sysctl_sched_nr_migrate, busiest->nr_running); in sched_balance_rq()
11740 cur_ld_moved = detach_tasks(&env); in sched_balance_rq()
11753 attach_tasks(&env); in sched_balance_rq()
11759 if (env.flags & LBF_NEED_BREAK) { in sched_balance_rq()
11760 env.flags &= ~LBF_NEED_BREAK; in sched_balance_rq()
11783 if ((env.flags & LBF_DST_PINNED) && env.imbalance > 0) { in sched_balance_rq()
11786 __cpumask_clear_cpu(env.dst_cpu, env.cpus); in sched_balance_rq()
11788 env.dst_rq = cpu_rq(env.new_dst_cpu); in sched_balance_rq()
11789 env.dst_cpu = env.new_dst_cpu; in sched_balance_rq()
11790 env.flags &= ~LBF_DST_PINNED; in sched_balance_rq()
11791 env.loop = 0; in sched_balance_rq()
11792 env.loop_break = SCHED_NR_MIGRATE_BREAK; in sched_balance_rq()
11807 if ((env.flags & LBF_SOME_PINNED) && env.imbalance > 0) in sched_balance_rq()
11812 if (unlikely(env.flags & LBF_ALL_PINNED)) { in sched_balance_rq()
11822 if (!cpumask_subset(cpus, env.dst_grpmask)) { in sched_balance_rq()
11823 env.loop = 0; in sched_balance_rq()
11824 env.loop_break = SCHED_NR_MIGRATE_BREAK; in sched_balance_rq()
11843 env.migration_type != migrate_misfit) in sched_balance_rq()
11846 if (need_active_balance(&env)) { in sched_balance_rq()
11862 env.flags &= ~LBF_ALL_PINNED; in sched_balance_rq()
11888 if (likely(!active_balance) || need_active_balance(&env)) { in sched_balance_rq()
11901 if (sd_parent && !(env.flags & LBF_ALL_PINNED)) { in sched_balance_rq()
11931 if (env.idle == CPU_NEWLY_IDLE || in sched_balance_rq()
11932 env.migration_type == migrate_misfit) in sched_balance_rq()
11936 if ((env.flags & LBF_ALL_PINNED && in sched_balance_rq()
12030 struct lb_env env = { in active_load_balance_cpu_stop() local
12043 p = detach_one_task(&env); in active_load_balance_cpu_stop()