1 #ifndef __LINUX_PAGE_CGROUP_H
2 #define __LINUX_PAGE_CGROUP_H
5 /* flags for mem_cgroup */
6 PCG_USED = 0x01, /* This page is charged to a memcg */
7 PCG_MEM = 0x02, /* This page holds a memory charge */
8 PCG_MEMSW = 0x04, /* This page holds a memory+swap charge */
12 #ifndef __GENERATING_BOUNDS_H
13 #include <generated/bounds.h>
16 #include <linux/bit_spinlock.h>
19 * Page Cgroup can be considered as an extended mem_map.
20 * A page_cgroup page is associated with every page descriptor. The
21 * page_cgroup helps us identify information about the cgroup
22 * All page cgroups are allocated at boot or memory hotplug event,
23 * then the page cgroup for pfn always exists.
27 struct mem_cgroup *mem_cgroup;
30 void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat);
32 #ifdef CONFIG_SPARSEMEM
33 static inline void __init page_cgroup_init_flatmem(void)
36 extern void __init page_cgroup_init(void);
38 void __init page_cgroup_init_flatmem(void);
39 static inline void __init page_cgroup_init(void)
44 struct page_cgroup *lookup_page_cgroup(struct page *page);
45 struct page *lookup_cgroup_page(struct page_cgroup *pc);
47 static inline int PageCgroupUsed(struct page_cgroup *pc)
49 return !!(pc->flags & PCG_USED);
52 #else /* CONFIG_MEMCG */
55 static inline void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat)
59 static inline struct page_cgroup *lookup_page_cgroup(struct page *page)
64 static inline void page_cgroup_init(void)
68 static inline void __init page_cgroup_init_flatmem(void)
72 #endif /* CONFIG_MEMCG */
74 #include <linux/swap.h>
76 #ifdef CONFIG_MEMCG_SWAP
77 extern unsigned short swap_cgroup_cmpxchg(swp_entry_t ent,
78 unsigned short old, unsigned short new);
79 extern unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id);
80 extern unsigned short lookup_swap_cgroup_id(swp_entry_t ent);
81 extern int swap_cgroup_swapon(int type, unsigned long max_pages);
82 extern void swap_cgroup_swapoff(int type);
86 unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id)
92 unsigned short lookup_swap_cgroup_id(swp_entry_t ent)
98 swap_cgroup_swapon(int type, unsigned long max_pages)
103 static inline void swap_cgroup_swapoff(int type)
108 #endif /* CONFIG_MEMCG_SWAP */
110 #endif /* !__GENERATING_BOUNDS_H */
112 #endif /* __LINUX_PAGE_CGROUP_H */