linux - mm/memcontrol-v1.h

130 lines · 4.5 KiB

1	/* SPDX-License-Identifier: GPL-2.0-or-later */
2
3	#ifndef __MM_MEMCONTROL_V1_H
4	#define __MM_MEMCONTROL_V1_H
5
6	#include <linux/cgroup-defs.h>
7	#include <linux/memcontrol.h>
8
9	/* Cgroup v1 and v2 common declarations */
10
11	/*
12	* Iteration constructs for visiting all cgroups (under a tree). If
13	* loops are exited prematurely (break), mem_cgroup_iter_break() must
14	* be used for reference counting.
15	*/
16	#define for_each_mem_cgroup_tree(iter, root) \
17	for (iter = mem_cgroup_iter(root, NULL, NULL); \
18	iter != NULL; \
19	iter = mem_cgroup_iter(root, iter, NULL))
20
21	void drain_all_stock(struct mem_cgroup *root_memcg);
22
23	int memory_stat_show(struct seq_file m, void v);
24
25	struct mem_cgroup mem_cgroup_private_id_get_online(struct mem_cgroup memcg,
26	unsigned int n);
27
28	/* Cgroup v1-specific declarations */
29	#ifdef CONFIG_MEMCG_V1
30
31	/* Whether legacy memory+swap accounting is active */
32	static inline bool do_memsw_account(void)
33	{
34	return !cgroup_subsys_on_dfl(memory_cgrp_subsys);
35	}
36
37	unsigned long memcg_events_local(struct mem_cgroup *memcg, int event);
38	unsigned long memcg_page_state_local(struct mem_cgroup *memcg, int idx);
39	unsigned long memcg_page_state_local_output(struct mem_cgroup *memcg, int item);
40	bool memcg1_alloc_events(struct mem_cgroup *memcg);
41	void memcg1_free_events(struct mem_cgroup *memcg);
42
43	void memcg1_memcg_init(struct mem_cgroup *memcg);
44	void memcg1_remove_from_trees(struct mem_cgroup *memcg);
45
46	static inline void memcg1_soft_limit_reset(struct mem_cgroup *memcg)
47	{
48	WRITE_ONCE(memcg->soft_limit, PAGE_COUNTER_MAX);
49	}
50
51	struct cgroup_taskset;
52	void memcg1_css_offline(struct mem_cgroup *memcg);
53
54	/* for encoding cft->private value on file */
55	enum res_type {
56	_MEM,
57	_MEMSWAP,
58	_KMEM,
59	_TCP,
60	};
61
62	bool memcg1_oom_prepare(struct mem_cgroup memcg, bool locked);
63	void memcg1_oom_finish(struct mem_cgroup *memcg, bool locked);
64	void memcg1_oom_recover(struct mem_cgroup *memcg);
65
66	void memcg1_commit_charge(struct folio folio, struct mem_cgroup memcg);
67	void memcg1_uncharge_batch(struct mem_cgroup *memcg, unsigned long pgpgout,
68	unsigned long nr_memory, int nid);
69
70	void memcg1_stat_format(struct mem_cgroup memcg, struct seq_buf s);
71	void reparent_memcg1_state_local(struct mem_cgroup memcg, struct mem_cgroup parent);
72	void reparent_memcg1_lruvec_state_local(struct mem_cgroup memcg, struct mem_cgroup parent);
73
74	void reparent_memcg_state_local(struct mem_cgroup *memcg,
75	struct mem_cgroup *parent, int idx);
76	void reparent_memcg_lruvec_state_local(struct mem_cgroup *memcg,
77	struct mem_cgroup *parent, int idx);
78
79	void memcg1_account_kmem(struct mem_cgroup *memcg, int nr_pages);
80	static inline bool memcg1_tcpmem_active(struct mem_cgroup *memcg)
81	{
82	return memcg->tcpmem_active;
83	}
84	bool memcg1_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages,
85	gfp_t gfp_mask);
86	static inline void memcg1_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages)
87	{
88	page_counter_uncharge(&memcg->tcpmem, nr_pages);
89	}
90
91	extern struct cftype memsw_files[];
92	extern struct cftype mem_cgroup_legacy_files[];
93
94	#else /* CONFIG_MEMCG_V1 */
95
96	static inline bool do_memsw_account(void) { return false; }
97	static inline bool memcg1_alloc_events(struct mem_cgroup *memcg) { return true; }
98	static inline void memcg1_free_events(struct mem_cgroup *memcg) {}
99
100	static inline void memcg1_memcg_init(struct mem_cgroup *memcg) {}
101	static inline void memcg1_remove_from_trees(struct mem_cgroup *memcg) {}
102	static inline void memcg1_soft_limit_reset(struct mem_cgroup *memcg) {}
103	static inline void memcg1_css_offline(struct mem_cgroup *memcg) {}
104
105	static inline bool memcg1_oom_prepare(struct mem_cgroup memcg, bool locked)
106	{
107	*locked = false;
108	return true;
109	}
110	static inline void memcg1_oom_finish(struct mem_cgroup *memcg, bool locked) {}
111	static inline void memcg1_oom_recover(struct mem_cgroup *memcg) {}
112
113	static inline void memcg1_commit_charge(struct folio *folio,
114	struct mem_cgroup *memcg) {}
115
116	static inline void memcg1_uncharge_batch(struct mem_cgroup *memcg,
117	unsigned long pgpgout,
118	unsigned long nr_memory, int nid) {}
119
120	static inline void memcg1_stat_format(struct mem_cgroup memcg, struct seq_buf s) {}
121
122	static inline void memcg1_account_kmem(struct mem_cgroup *memcg, int nr_pages) {}
123	static inline bool memcg1_tcpmem_active(struct mem_cgroup *memcg) { return false; }
124	static inline bool memcg1_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages,
125	gfp_t gfp_mask) { return true; }
126	static inline void memcg1_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages) {}
127
128	#endif /* CONFIG_MEMCG_V1 */
129
130	#endif /* __MM_MEMCONTROL_V1_H */