377 void reset_isolation_suitable(pg_data_t *pgdat)  in reset_isolation_suitable()  argument
382 		struct zone *zone = &pgdat->node_zones[zoneid];  in reset_isolation_suitable()
748 static bool too_many_isolated(pg_data_t *pgdat)  in too_many_isolated()  argument
754 	inactive = node_page_state(pgdat, NR_INACTIVE_FILE) +  in too_many_isolated()
755 			node_page_state(pgdat, NR_INACTIVE_ANON);  in too_many_isolated()
756 	active = node_page_state(pgdat, NR_ACTIVE_FILE) +  in too_many_isolated()
757 			node_page_state(pgdat, NR_ACTIVE_ANON);  in too_many_isolated()
758 	isolated = node_page_state(pgdat, NR_ISOLATED_FILE) +  in too_many_isolated()
759 			node_page_state(pgdat, NR_ISOLATED_ANON);  in too_many_isolated()
763 		wake_throttle_isolated(pgdat);  in too_many_isolated()
789 	pg_data_t *pgdat = cc->zone->zone_pgdat;  in isolate_migratepages_block()  local
809 	while (unlikely(too_many_isolated(pgdat))) {  in isolate_migratepages_block()
818 		reclaim_throttle(pgdat, VMSCAN_THROTTLE_ISOLATED);  in isolate_migratepages_block()
1983 static bool kswapd_is_running(pg_data_t *pgdat)  in kswapd_is_running()  argument
1987 	pgdat_kswapd_lock(pgdat);  in kswapd_is_running()
1988 	running = pgdat->kswapd && task_is_running(pgdat->kswapd);  in kswapd_is_running()
1989 	pgdat_kswapd_unlock(pgdat);  in kswapd_is_running()
2028 static unsigned int fragmentation_score_node(pg_data_t *pgdat)  in fragmentation_score_node()  argument
2036 		zone = &pgdat->node_zones[zoneid];  in fragmentation_score_node()
2043 static unsigned int fragmentation_score_wmark(pg_data_t *pgdat, bool low)  in fragmentation_score_wmark()  argument
2056 static bool should_proactive_compact_node(pg_data_t *pgdat)  in should_proactive_compact_node()  argument
2060 	if (!sysctl_compaction_proactiveness || kswapd_is_running(pgdat))  in should_proactive_compact_node()
2063 	wmark_high = fragmentation_score_wmark(pgdat, false);  in should_proactive_compact_node()
2064 	return fragmentation_score_node(pgdat) > wmark_high;  in should_proactive_compact_node()
2095 		pg_data_t *pgdat;  in __compact_finished()  local
2097 		pgdat = cc->zone->zone_pgdat;  in __compact_finished()
2098 		if (kswapd_is_running(pgdat))  in __compact_finished()
2102 		wmark_low = fragmentation_score_wmark(pgdat, true);  in __compact_finished()
2653 static void proactive_compact_node(pg_data_t *pgdat)  in proactive_compact_node()  argument
2667 		zone = &pgdat->node_zones[zoneid];  in proactive_compact_node()
2683 	pg_data_t *pgdat = NODE_DATA(nid);  in compact_node()  local
2697 		zone = &pgdat->node_zones[zoneid];  in compact_node()
2740 			pg_data_t *pgdat = NODE_DATA(nid);  in compaction_proactiveness_sysctl_handler()  local
2742 			if (pgdat->proactive_compact_trigger)  in compaction_proactiveness_sysctl_handler()
2745 			pgdat->proactive_compact_trigger = true;  in compaction_proactiveness_sysctl_handler()
2746 			wake_up_interruptible(&pgdat->kcompactd_wait);  in compaction_proactiveness_sysctl_handler()
2795 static inline bool kcompactd_work_requested(pg_data_t *pgdat)  in kcompactd_work_requested()  argument
2797 	return pgdat->kcompactd_max_order > 0 || kthread_should_stop() ||  in kcompactd_work_requested()
2798 		pgdat->proactive_compact_trigger;  in kcompactd_work_requested()
2801 static bool kcompactd_node_suitable(pg_data_t *pgdat)  in kcompactd_node_suitable()  argument
2805 	enum zone_type highest_zoneidx = pgdat->kcompactd_highest_zoneidx;  in kcompactd_node_suitable()
2808 		zone = &pgdat->node_zones[zoneid];  in kcompactd_node_suitable()
2813 		if (compaction_suitable(zone, pgdat->kcompactd_max_order, 0,  in kcompactd_node_suitable()
2821 static void kcompactd_do_work(pg_data_t *pgdat)  in kcompactd_do_work()  argument
2830 		.order = pgdat->kcompactd_max_order,  in kcompactd_do_work()
2831 		.search_order = pgdat->kcompactd_max_order,  in kcompactd_do_work()
2832 		.highest_zoneidx = pgdat->kcompactd_highest_zoneidx,  in kcompactd_do_work()
2837 	trace_mm_compaction_kcompactd_wake(pgdat->node_id, cc.order,  in kcompactd_do_work()
2844 		zone = &pgdat->node_zones[zoneid];  in kcompactd_do_work()
2893 	if (pgdat->kcompactd_max_order <= cc.order)  in kcompactd_do_work()
2894 		pgdat->kcompactd_max_order = 0;  in kcompactd_do_work()
2895 	if (pgdat->kcompactd_highest_zoneidx >= cc.highest_zoneidx)  in kcompactd_do_work()
2896 		pgdat->kcompactd_highest_zoneidx = pgdat->nr_zones - 1;  in kcompactd_do_work()
2899 void wakeup_kcompactd(pg_data_t *pgdat, int order, int highest_zoneidx)  in wakeup_kcompactd()  argument
2904 	if (pgdat->kcompactd_max_order < order)  in wakeup_kcompactd()
2905 		pgdat->kcompactd_max_order = order;  in wakeup_kcompactd()
2907 	if (pgdat->kcompactd_highest_zoneidx > highest_zoneidx)  in wakeup_kcompactd()
2908 		pgdat->kcompactd_highest_zoneidx = highest_zoneidx;  in wakeup_kcompactd()
2914 	if (!wq_has_sleeper(&pgdat->kcompactd_wait))  in wakeup_kcompactd()
2917 	if (!kcompactd_node_suitable(pgdat))  in wakeup_kcompactd()
2920 	trace_mm_compaction_wakeup_kcompactd(pgdat->node_id, order,  in wakeup_kcompactd()
2922 	wake_up_interruptible(&pgdat->kcompactd_wait);  in wakeup_kcompactd()
2931 	pg_data_t *pgdat = (pg_data_t *)p;  in kcompactd()  local
2936 	const struct cpumask *cpumask = cpumask_of_node(pgdat->node_id);  in kcompactd()
2943 	pgdat->kcompactd_max_order = 0;  in kcompactd()
2944 	pgdat->kcompactd_highest_zoneidx = pgdat->nr_zones - 1;  in kcompactd()
2955 		trace_mm_compaction_kcompactd_sleep(pgdat->node_id);  in kcompactd()
2956 		if (wait_event_freezable_timeout(pgdat->kcompactd_wait,  in kcompactd()
2957 			kcompactd_work_requested(pgdat), timeout) &&  in kcompactd()
2958 			!pgdat->proactive_compact_trigger) {  in kcompactd()
2961 			kcompactd_do_work(pgdat);  in kcompactd()
2979 		if (should_proactive_compact_node(pgdat)) {  in kcompactd()
2982 			prev_score = fragmentation_score_node(pgdat);  in kcompactd()
2983 			proactive_compact_node(pgdat);  in kcompactd()
2984 			score = fragmentation_score_node(pgdat);  in kcompactd()
2993 		if (unlikely(pgdat->proactive_compact_trigger))  in kcompactd()
2994 			pgdat->proactive_compact_trigger = false;  in kcompactd()
3006 	pg_data_t *pgdat = NODE_DATA(nid);  in kcompactd_run()  local
3008 	if (pgdat->kcompactd)  in kcompactd_run()
3011 	pgdat->kcompactd = kthread_run(kcompactd, pgdat, "kcompactd%d", nid);  in kcompactd_run()
3012 	if (IS_ERR(pgdat->kcompactd)) {  in kcompactd_run()
3014 		pgdat->kcompactd = NULL;  in kcompactd_run()
3043 		pg_data_t *pgdat = NODE_DATA(nid);  in kcompactd_cpu_online()  local
3046 		mask = cpumask_of_node(pgdat->node_id);  in kcompactd_cpu_online()
3050 			if (pgdat->kcompactd)  in kcompactd_cpu_online()
3051 				set_cpus_allowed_ptr(pgdat->kcompactd, mask);  in kcompactd_cpu_online()