linux-master/mm/vmscan.c

7016 static void kswapd_try_to_sleep(pg_data_t *pgdat, int alloc_order, int reclaim_order,
7034 	if (prepare_kswapd_sleep(pgdat, reclaim_order, highest_zoneidx)) {
7061 			if (READ_ONCE(pgdat->kswapd_order) < reclaim_order)
7062 				WRITE_ONCE(pgdat->kswapd_order, reclaim_order);
7074 	    prepare_kswapd_sleep(pgdat, reclaim_order, highest_zoneidx)) {
7115 	unsigned int alloc_order, reclaim_order;
7145 		alloc_order = reclaim_order = READ_ONCE(pgdat->kswapd_order);
7150 		kswapd_try_to_sleep(pgdat, alloc_order, reclaim_order,
7174 		 * for the order it finished reclaiming at (reclaim_order)
7180 		reclaim_order = balance_pgdat(pgdat, alloc_order,
7182 		if (reclaim_order < alloc_order)