diff options
Diffstat (limited to 'mm/memcontrol-v1.h')
| -rw-r--r-- | mm/memcontrol-v1.h | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/mm/memcontrol-v1.h b/mm/memcontrol-v1.h new file mode 100644 index 000000000000..56d7eaa98274 --- /dev/null +++ b/mm/memcontrol-v1.h @@ -0,0 +1,147 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#ifndef __MM_MEMCONTROL_V1_H +#define __MM_MEMCONTROL_V1_H + +#include <linux/cgroup-defs.h> + +/* Cgroup v1 and v2 common declarations */ + +void mem_cgroup_charge_statistics(struct mem_cgroup *memcg, int nr_pages); +int try_charge_memcg(struct mem_cgroup *memcg, gfp_t gfp_mask, + unsigned int nr_pages); + +static inline int try_charge(struct mem_cgroup *memcg, gfp_t gfp_mask, + unsigned int nr_pages) +{ + if (mem_cgroup_is_root(memcg)) + return 0; + + return try_charge_memcg(memcg, gfp_mask, nr_pages); +} + +void mem_cgroup_id_get_many(struct mem_cgroup *memcg, unsigned int n); +void mem_cgroup_id_put_many(struct mem_cgroup *memcg, unsigned int n); + +/* + * Iteration constructs for visiting all cgroups (under a tree). If + * loops are exited prematurely (break), mem_cgroup_iter_break() must + * be used for reference counting. + */ +#define for_each_mem_cgroup_tree(iter, root) \ + for (iter = mem_cgroup_iter(root, NULL, NULL); \ + iter != NULL; \ + iter = mem_cgroup_iter(root, iter, NULL)) + +#define for_each_mem_cgroup(iter) \ + for (iter = mem_cgroup_iter(NULL, NULL, NULL); \ + iter != NULL; \ + iter = mem_cgroup_iter(NULL, iter, NULL)) + +/* Whether legacy memory+swap accounting is active */ +static bool do_memsw_account(void) +{ + return !cgroup_subsys_on_dfl(memory_cgrp_subsys); +} + +/* + * Per memcg event counter is incremented at every pagein/pageout. With THP, + * it will be incremented by the number of pages. This counter is used + * to trigger some periodic events. This is straightforward and better + * than using jiffies etc. to handle periodic memcg event. + */ +enum mem_cgroup_events_target { + MEM_CGROUP_TARGET_THRESH, + MEM_CGROUP_TARGET_SOFTLIMIT, + MEM_CGROUP_NTARGETS, +}; + +bool mem_cgroup_event_ratelimit(struct mem_cgroup *memcg, + enum mem_cgroup_events_target target); +unsigned long mem_cgroup_usage(struct mem_cgroup *memcg, bool swap); + +void drain_all_stock(struct mem_cgroup *root_memcg); + +unsigned long memcg_events(struct mem_cgroup *memcg, int event); +unsigned long memcg_events_local(struct mem_cgroup *memcg, int event); +unsigned long memcg_page_state_local(struct mem_cgroup *memcg, int idx); +unsigned long memcg_page_state_output(struct mem_cgroup *memcg, int item); +unsigned long memcg_page_state_local_output(struct mem_cgroup *memcg, int item); +int memory_stat_show(struct seq_file *m, void *v); + +/* Cgroup v1-specific declarations */ +#ifdef CONFIG_MEMCG_V1 +void memcg1_memcg_init(struct mem_cgroup *memcg); +void memcg1_remove_from_trees(struct mem_cgroup *memcg); + +static inline void memcg1_soft_limit_reset(struct mem_cgroup *memcg) +{ + WRITE_ONCE(memcg->soft_limit, PAGE_COUNTER_MAX); +} + +bool memcg1_wait_acct_move(struct mem_cgroup *memcg); + +struct cgroup_taskset; +int memcg1_can_attach(struct cgroup_taskset *tset); +void memcg1_cancel_attach(struct cgroup_taskset *tset); +void memcg1_move_task(void); +void memcg1_css_offline(struct mem_cgroup *memcg); + +/* for encoding cft->private value on file */ +enum res_type { + _MEM, + _MEMSWAP, + _KMEM, + _TCP, +}; + +bool memcg1_oom_prepare(struct mem_cgroup *memcg, bool *locked); +void memcg1_oom_finish(struct mem_cgroup *memcg, bool locked); +void memcg1_oom_recover(struct mem_cgroup *memcg); + +void memcg1_check_events(struct mem_cgroup *memcg, int nid); + +void memcg1_stat_format(struct mem_cgroup *memcg, struct seq_buf *s); + +void memcg1_account_kmem(struct mem_cgroup *memcg, int nr_pages); +static inline bool memcg1_tcpmem_active(struct mem_cgroup *memcg) +{ + return memcg->tcpmem_active; +} +bool memcg1_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages, + gfp_t gfp_mask); +static inline void memcg1_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages) +{ + page_counter_uncharge(&memcg->tcpmem, nr_pages); +} + +extern struct cftype memsw_files[]; +extern struct cftype mem_cgroup_legacy_files[]; + +#else /* CONFIG_MEMCG_V1 */ + +static inline void memcg1_memcg_init(struct mem_cgroup *memcg) {} +static inline void memcg1_remove_from_trees(struct mem_cgroup *memcg) {} +static inline void memcg1_soft_limit_reset(struct mem_cgroup *memcg) {} +static inline bool memcg1_wait_acct_move(struct mem_cgroup *memcg) { return false; } +static inline void memcg1_css_offline(struct mem_cgroup *memcg) {} + +static inline bool memcg1_oom_prepare(struct mem_cgroup *memcg, bool *locked) { return true; } +static inline void memcg1_oom_finish(struct mem_cgroup *memcg, bool locked) {} +static inline void memcg1_oom_recover(struct mem_cgroup *memcg) {} + +static inline void memcg1_check_events(struct mem_cgroup *memcg, int nid) {} + +static inline void memcg1_stat_format(struct mem_cgroup *memcg, struct seq_buf *s) {} + +static inline void memcg1_account_kmem(struct mem_cgroup *memcg, int nr_pages) {} +static inline bool memcg1_tcpmem_active(struct mem_cgroup *memcg) { return false; } +static inline bool memcg1_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages, + gfp_t gfp_mask) { return true; } +static inline void memcg1_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages) {} + +extern struct cftype memsw_files[]; +extern struct cftype mem_cgroup_legacy_files[]; +#endif /* CONFIG_MEMCG_V1 */ + +#endif /* __MM_MEMCONTROL_V1_H */ |