29  * the memory controller.
37 	/* Create two nested cgroups with the memory controller enabled */  in test_memcg_subtree_control()
46 	if (cg_write(parent, "cgroup.subtree_control", "+memory"))  in test_memcg_subtree_control()
52 	if (cg_read_strstr(child, "cgroup.controllers", "memory"))  in test_memcg_subtree_control()
55 	/* Create two nested cgroups without enabling memory controller */  in test_memcg_subtree_control()
70 	if (!cg_read_strstr(child2, "cgroup.controllers", "memory"))  in test_memcg_subtree_control()
104 	current = cg_read_long(cgroup, "memory.current");  in alloc_anon_50M_check()
111 	anon = cg_read_key_long(cgroup, "memory.stat", "anon ");  in alloc_anon_50M_check()
138 	current = cg_read_long(cgroup, "memory.current");  in alloc_pagecache_50M_check()
142 	file = cg_read_key_long(cgroup, "memory.stat", "file ");  in alloc_pagecache_50M_check()
157  * This test create a memory cgroup, allocates
158  * some anonymous memory and some pagecache
159  * and check memory.current and some memory.stat values.
174 	current = cg_read_long(memcg, "memory.current");  in test_memcg_current()
243  * A       memory.min = 0,    memory.max = 200M
244  * A/B     memory.min = 50M
245  * A/B/C   memory.min = 75M,  memory.current = 50M
246  * A/B/D   memory.min = 25M,  memory.current = 50M
247  * A/B/E   memory.min = 0,    memory.current = 50M
248  * A/B/F   memory.min = 500M, memory.current = 0
250  * (or memory.low if we test soft protection)
255  * memory pressure in A.
257  * Then it checks actual memory usages and expects that:
258  * A/B    memory.current ~= 50M
259  * A/B/C  memory.current ~= 29M
260  * A/B/D  memory.current ~= 21M
261  * A/B/E  memory.current ~= 0
262  * A/B/F  memory.current  = 0
266  * unprotected memory in A available, and checks that:
267  * a) memory.min protects pagecache even in this case,
268  * b) memory.low allows reclaiming page cache with low events.
275 	const char *attribute = min ? "memory.min" : "memory.low";  in test_memcg_protection()
300 		/* No memory.min on older kernels is fine */  in test_memcg_protection()
306 	if (cg_write(parent[0], "cgroup.subtree_control", "+memory"))  in test_memcg_protection()
309 	if (cg_write(parent[0], "memory.max", "200M"))  in test_memcg_protection()
312 	if (cg_write(parent[0], "memory.swap.max", "0"))  in test_memcg_protection()
318 	if (cg_write(parent[1], "cgroup.subtree_control", "+memory"))  in test_memcg_protection()
351 	while (!values_close(cg_read_long(parent[1], "memory.current"),  in test_memcg_protection()
361 	if (!values_close(cg_read_long(parent[1], "memory.current"), MB(50), 3))  in test_memcg_protection()
365 		c[i] = cg_read_long(children[i], "memory.current");  in test_memcg_protection()
381 			"memory.low prevents from allocating anon memory\n");  in test_memcg_protection()
385 	if (!values_close(cg_read_long(parent[1], "memory.current"), MB(50), 3))  in test_memcg_protection()
397 		oom = cg_read_key_long(children[i], "memory.events", "oom ");  in test_memcg_protection()
398 		low = cg_read_key_long(children[i], "memory.events", "low ");  in test_memcg_protection()
448 	high = cg_read_long(cgroup, "memory.high");  in alloc_pagecache_max_30M()
449 	max = cg_read_long(cgroup, "memory.max");  in alloc_pagecache_max_30M()
460 	current = cg_read_long(cgroup, "memory.current");  in alloc_pagecache_max_30M()
473  * This test checks that memory.high limits the amount of
474  * memory which can be consumed by either anonymous memory
490 	if (cg_read_strcmp(memcg, "memory.high", "max\n"))  in test_memcg_high()
493 	if (cg_write(memcg, "memory.swap.max", "0"))  in test_memcg_high()
496 	if (cg_write(memcg, "memory.high", "30M"))  in test_memcg_high()
508 	high = cg_read_key_long(memcg, "memory.events", "high ");  in test_memcg_high()
537  * This test checks that memory.high is able to throttle big single shot
554 	pre_high = cg_read_key_long(memcg, "memory.events", "high ");  in test_memcg_high_sync()
555 	pre_max = cg_read_key_long(memcg, "memory.events", "max ");  in test_memcg_high_sync()
559 	if (cg_write(memcg, "memory.swap.max", "0"))  in test_memcg_high_sync()
562 	if (cg_write(memcg, "memory.high", "30M"))  in test_memcg_high_sync()
565 	if (cg_write(memcg, "memory.max", "140M"))  in test_memcg_high_sync()
578 	post_high = cg_read_key_long(memcg, "memory.events", "high ");  in test_memcg_high_sync()
579 	post_max = cg_read_key_long(memcg, "memory.events", "max ");  in test_memcg_high_sync()
598  * This test checks that memory.max limits the amount of
599  * memory which can be consumed by either anonymous memory
615 	if (cg_read_strcmp(memcg, "memory.max", "max\n"))  in test_memcg_max()
618 	if (cg_write(memcg, "memory.swap.max", "0"))  in test_memcg_max()
621 	if (cg_write(memcg, "memory.max", "30M"))  in test_memcg_max()
631 	current = cg_read_long(memcg, "memory.current");  in test_memcg_max()
635 	max = cg_read_key_long(memcg, "memory.events", "max ");  in test_memcg_max()
649  * This test checks that memory.reclaim reclaims the given
650  * amount of memory (from both anon and file, if possible).
666 	current = cg_read_long(memcg, "memory.current");  in test_memcg_reclaim()
691 	while (!values_close(cg_read_long(memcg, "memory.current"),  in test_memcg_reclaim()
712 		current = cg_read_long(memcg, "memory.current");  in test_memcg_reclaim()
724 		err = cg_write(memcg, "memory.reclaim", buf);  in test_memcg_reclaim()
730 			current = cg_read_long(memcg, "memory.current");  in test_memcg_reclaim()
765 	mem_current = cg_read_long(cgroup, "memory.current");  in alloc_anon_50M_check_swap()
769 	swap_current = cg_read_long(cgroup, "memory.swap.current");  in alloc_anon_50M_check_swap()
781  * This test checks that memory.swap.max limits the amount of
782  * anonymous memory which can be swapped out.
800 	if (cg_read_long(memcg, "memory.swap.current")) {  in test_memcg_swap_max()
805 	if (cg_read_strcmp(memcg, "memory.max", "max\n"))  in test_memcg_swap_max()
808 	if (cg_read_strcmp(memcg, "memory.swap.max", "max\n"))  in test_memcg_swap_max()
811 	if (cg_write(memcg, "memory.swap.max", "30M"))  in test_memcg_swap_max()
814 	if (cg_write(memcg, "memory.max", "30M"))  in test_memcg_swap_max()
821 	if (cg_read_key_long(memcg, "memory.events", "oom ") != 1)  in test_memcg_swap_max()
824 	if (cg_read_key_long(memcg, "memory.events", "oom_kill ") != 1)  in test_memcg_swap_max()
830 	max = cg_read_key_long(memcg, "memory.events", "max ");  in test_memcg_swap_max()
844  * This test disables swapping and tries to allocate anonymous memory
846  * memory.events.
860 	if (cg_write(memcg, "memory.max", "30M"))  in test_memcg_oom_events()
863 	if (cg_write(memcg, "memory.swap.max", "0"))  in test_memcg_oom_events()
872 	if (cg_read_key_long(memcg, "memory.events", "oom ") != 1)  in test_memcg_oom_events()
875 	if (cg_read_key_long(memcg, "memory.events", "oom_kill ") != 1)  in test_memcg_oom_events()
978 		current = cg_read_long(cgroup, "memory.current");  in tcp_client()
979 		sock = cg_read_key_long(cgroup, "memory.stat", "sock ");  in tcp_client()
998  * This test checks socket memory accounting.
1003  * memory.current and memory.stat.sock are similar.
1055 	if (cg_read_long(memcg, "memory.current") < 0)  in test_memcg_sock()
1058 	if (cg_read_key_long(memcg, "memory.stat", "sock "))  in test_memcg_sock()
1071  * This test disables swapping and tries to allocate anonymous memory
1072  * up to OOM with memory.group.oom set. Then it checks that all
1094 	if (cg_write(parent, "cgroup.subtree_control", "+memory"))  in test_memcg_oom_group_leaf_events()
1097 	if (cg_write(child, "memory.max", "50M"))  in test_memcg_oom_group_leaf_events()
1100 	if (cg_write(child, "memory.swap.max", "0"))  in test_memcg_oom_group_leaf_events()
1103 	if (cg_write(child, "memory.oom.group", "1"))  in test_memcg_oom_group_leaf_events()
1115 	if (cg_read_key_long(child, "memory.events", "oom_kill ") <= 0)  in test_memcg_oom_group_leaf_events()
1119 			parent, "memory.events", "oom_kill ");  in test_memcg_oom_group_leaf_events()
1144  * This test disables swapping and tries to allocate anonymous memory
1145  * up to OOM with memory.group.oom set. Then it checks that all
1165 	if (cg_write(parent, "memory.max", "80M"))  in test_memcg_oom_group_parent_events()
1168 	if (cg_write(parent, "memory.swap.max", "0"))  in test_memcg_oom_group_parent_events()
1171 	if (cg_write(parent, "memory.oom.group", "1"))  in test_memcg_oom_group_parent_events()
1200  * This test disables swapping and tries to allocate anonymous memory
1201  * up to OOM with memory.group.oom set. Then it checks that all
1218 	if (cg_write(memcg, "memory.max", "50M"))  in test_memcg_oom_group_score_events()
1221 	if (cg_write(memcg, "memory.swap.max", "0"))  in test_memcg_oom_group_score_events()
1224 	if (cg_write(memcg, "memory.oom.group", "1"))  in test_memcg_oom_group_score_events()
1235 	if (cg_read_key_long(memcg, "memory.events", "oom_kill ") != 3)  in test_memcg_oom_group_score_events()
1282 	 * Check that memory controller is available:  in main()
1283 	 * memory is listed in cgroup.controllers  in main()
1285 	if (cg_read_strstr(root, "cgroup.controllers", "memory"))  in main()
1286 		ksft_exit_skip("memory controller isn't available\n");  in main()
1288 	if (cg_read_strstr(root, "cgroup.subtree_control", "memory"))  in main()
1289 		if (cg_write(root, "cgroup.subtree_control", "+memory"))  in main()
1290 			ksft_exit_skip("Failed to set memory controller\n");  in main()