386 void reset_isolation_suitable(pg_data_t *pgdat)  in reset_isolation_suitable()  argument
391 		struct zone *zone = &pgdat->node_zones[zoneid];  in reset_isolation_suitable()
792 static bool too_many_isolated(pg_data_t *pgdat)  in too_many_isolated()  argument
796 	inactive = node_page_state(pgdat, NR_INACTIVE_FILE) +  in too_many_isolated()
797 			node_page_state(pgdat, NR_INACTIVE_ANON);  in too_many_isolated()
798 	active = node_page_state(pgdat, NR_ACTIVE_FILE) +  in too_many_isolated()
799 			node_page_state(pgdat, NR_ACTIVE_ANON);  in too_many_isolated()
800 	isolated = node_page_state(pgdat, NR_ISOLATED_FILE) +  in too_many_isolated()
801 			node_page_state(pgdat, NR_ISOLATED_ANON);  in too_many_isolated()
828 	pg_data_t *pgdat = cc->zone->zone_pgdat;  in isolate_migratepages_block()  local
844 	while (unlikely(too_many_isolated(pgdat))) {  in isolate_migratepages_block()
897 		    && compact_unlock_should_abort(&pgdat->lru_lock,  in isolate_migratepages_block()
971 					spin_unlock_irqrestore(&pgdat->lru_lock,  in isolate_migratepages_block()
1001 			locked = compact_lock_irqsave(&pgdat->lru_lock,  in isolate_migratepages_block()
1026 		lruvec = mem_cgroup_page_lruvec(page, pgdat);  in isolate_migratepages_block()
1071 				spin_unlock_irqrestore(&pgdat->lru_lock, flags);  in isolate_migratepages_block()
1098 		spin_unlock_irqrestore(&pgdat->lru_lock, flags);  in isolate_migratepages_block()
1912 static bool kswapd_is_running(pg_data_t *pgdat)  in kswapd_is_running()  argument
1914 	return pgdat->kswapd && (pgdat->kswapd->state == TASK_RUNNING);  in kswapd_is_running()
1951 static unsigned int fragmentation_score_node(pg_data_t *pgdat)  in fragmentation_score_node()  argument
1959 		zone = &pgdat->node_zones[zoneid];  in fragmentation_score_node()
1966 static unsigned int fragmentation_score_wmark(pg_data_t *pgdat, bool low)  in fragmentation_score_wmark()  argument
1979 static bool should_proactive_compact_node(pg_data_t *pgdat)  in should_proactive_compact_node()  argument
1983 	if (!sysctl_compaction_proactiveness || kswapd_is_running(pgdat))  in should_proactive_compact_node()
1986 	wmark_high = fragmentation_score_wmark(pgdat, false);  in should_proactive_compact_node()
1987 	return fragmentation_score_node(pgdat) > wmark_high;  in should_proactive_compact_node()
2018 		pg_data_t *pgdat;  in __compact_finished()  local
2020 		pgdat = cc->zone->zone_pgdat;  in __compact_finished()
2021 		if (kswapd_is_running(pgdat))  in __compact_finished()
2025 		wmark_low = fragmentation_score_wmark(pgdat, true);  in __compact_finished()
2584 static void proactive_compact_node(pg_data_t *pgdat)  in proactive_compact_node()  argument
2598 		zone = &pgdat->node_zones[zoneid];  in proactive_compact_node()
2614 	pg_data_t *pgdat = NODE_DATA(nid);  in compact_node()  local
2628 		zone = &pgdat->node_zones[zoneid];  in compact_node()
2674 			pg_data_t *pgdat = NODE_DATA(nid);  in compaction_proactiveness_sysctl_handler()  local
2676 			if (pgdat->proactive_compact_trigger)  in compaction_proactiveness_sysctl_handler()
2679 			pgdat->proactive_compact_trigger = true;  in compaction_proactiveness_sysctl_handler()
2680 			wake_up_interruptible(&pgdat->kcompactd_wait);  in compaction_proactiveness_sysctl_handler()
2729 static inline bool kcompactd_work_requested(pg_data_t *pgdat)  in kcompactd_work_requested()  argument
2731 	return pgdat->kcompactd_max_order > 0 || kthread_should_stop() ||  in kcompactd_work_requested()
2732 		pgdat->proactive_compact_trigger;  in kcompactd_work_requested()
2735 static bool kcompactd_node_suitable(pg_data_t *pgdat)  in kcompactd_node_suitable()  argument
2739 	enum zone_type highest_zoneidx = pgdat->kcompactd_highest_zoneidx;  in kcompactd_node_suitable()
2742 		zone = &pgdat->node_zones[zoneid];  in kcompactd_node_suitable()
2747 		if (compaction_suitable(zone, pgdat->kcompactd_max_order, 0,  in kcompactd_node_suitable()
2755 static void kcompactd_do_work(pg_data_t *pgdat)  in kcompactd_do_work()  argument
2764 		.order = pgdat->kcompactd_max_order,  in kcompactd_do_work()
2765 		.search_order = pgdat->kcompactd_max_order,  in kcompactd_do_work()
2766 		.highest_zoneidx = pgdat->kcompactd_highest_zoneidx,  in kcompactd_do_work()
2771 	trace_mm_compaction_kcompactd_wake(pgdat->node_id, cc.order,  in kcompactd_do_work()
2778 		zone = &pgdat->node_zones[zoneid];  in kcompactd_do_work()
2827 	if (pgdat->kcompactd_max_order <= cc.order)  in kcompactd_do_work()
2828 		pgdat->kcompactd_max_order = 0;  in kcompactd_do_work()
2829 	if (pgdat->kcompactd_highest_zoneidx >= cc.highest_zoneidx)  in kcompactd_do_work()
2830 		pgdat->kcompactd_highest_zoneidx = pgdat->nr_zones - 1;  in kcompactd_do_work()
2833 void wakeup_kcompactd(pg_data_t *pgdat, int order, int highest_zoneidx)  in wakeup_kcompactd()  argument
2838 	if (pgdat->kcompactd_max_order < order)  in wakeup_kcompactd()
2839 		pgdat->kcompactd_max_order = order;  in wakeup_kcompactd()
2841 	if (pgdat->kcompactd_highest_zoneidx > highest_zoneidx)  in wakeup_kcompactd()
2842 		pgdat->kcompactd_highest_zoneidx = highest_zoneidx;  in wakeup_kcompactd()
2848 	if (!wq_has_sleeper(&pgdat->kcompactd_wait))  in wakeup_kcompactd()
2851 	if (!kcompactd_node_suitable(pgdat))  in wakeup_kcompactd()
2854 	trace_mm_compaction_wakeup_kcompactd(pgdat->node_id, order,  in wakeup_kcompactd()
2856 	wake_up_interruptible(&pgdat->kcompactd_wait);  in wakeup_kcompactd()
2865 	pg_data_t *pgdat = (pg_data_t*)p;  in kcompactd()  local
2869 	const struct cpumask *cpumask = cpumask_of_node(pgdat->node_id);  in kcompactd()
2876 	pgdat->kcompactd_max_order = 0;  in kcompactd()
2877 	pgdat->kcompactd_highest_zoneidx = pgdat->nr_zones - 1;  in kcompactd()
2886 		trace_mm_compaction_kcompactd_sleep(pgdat->node_id);  in kcompactd()
2887 		if (wait_event_freezable_timeout(pgdat->kcompactd_wait,  in kcompactd()
2888 			kcompactd_work_requested(pgdat), timeout) &&  in kcompactd()
2889 			!pgdat->proactive_compact_trigger) {  in kcompactd()
2892 			kcompactd_do_work(pgdat);  in kcompactd()
2898 		if (should_proactive_compact_node(pgdat)) {  in kcompactd()
2910 				!pgdat->proactive_compact_trigger) {  in kcompactd()
2915 			prev_score = fragmentation_score_node(pgdat);  in kcompactd()
2916 			proactive_compact_node(pgdat);  in kcompactd()
2917 			score = fragmentation_score_node(pgdat);  in kcompactd()
2925 		if (pgdat->proactive_compact_trigger)  in kcompactd()
2926 			pgdat->proactive_compact_trigger = false;  in kcompactd()
2938 	pg_data_t *pgdat = NODE_DATA(nid);  in kcompactd_run()  local
2941 	if (pgdat->kcompactd)  in kcompactd_run()
2944 	pgdat->kcompactd = kthread_run(kcompactd, pgdat, "kcompactd%d", nid);  in kcompactd_run()
2945 	if (IS_ERR(pgdat->kcompactd)) {  in kcompactd_run()
2947 		ret = PTR_ERR(pgdat->kcompactd);  in kcompactd_run()
2948 		pgdat->kcompactd = NULL;  in kcompactd_run()
2978 		pg_data_t *pgdat = NODE_DATA(nid);  in kcompactd_cpu_online()  local
2981 		mask = cpumask_of_node(pgdat->node_id);  in kcompactd_cpu_online()
2985 			set_cpus_allowed_ptr(pgdat->kcompactd, mask);  in kcompactd_cpu_online()