1 #ifndef __LINUX_PAGE_CGROUP_H
2 #define __LINUX_PAGE_CGROUP_H
4 #ifdef CONFIG_CGROUP_MEM_RES_CTLR
5 #include <linux/bit_spinlock.h>
7 * Page Cgroup can be considered as an extended mem_map.
8 * A page_cgroup page is associated with every page descriptor. The
9 * page_cgroup helps us identify information about the cgroup
10 * All page cgroups are allocated at boot or memory hotplug event,
11 * then the page cgroup for pfn always exists.
15 struct mem_cgroup *mem_cgroup;
17 struct list_head lru; /* per cgroup LRU list */
20 void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat);
22 #ifdef CONFIG_SPARSEMEM
23 static inline void __init page_cgroup_init_flatmem(void)
26 extern void __init page_cgroup_init(void);
28 void __init page_cgroup_init_flatmem(void);
29 static inline void __init page_cgroup_init(void)
34 struct page_cgroup *lookup_page_cgroup(struct page *page);
37 /* flags for mem_cgroup */
38 PCG_LOCK, /* page cgroup is locked */
39 PCG_CACHE, /* charged as cache */
40 PCG_USED, /* this object is in use. */
41 PCG_ACCT_LRU, /* page has been accounted for */
44 #define TESTPCGFLAG(uname, lname) \
45 static inline int PageCgroup##uname(struct page_cgroup *pc) \
46 { return test_bit(PCG_##lname, &pc->flags); }
48 #define SETPCGFLAG(uname, lname) \
49 static inline void SetPageCgroup##uname(struct page_cgroup *pc)\
50 { set_bit(PCG_##lname, &pc->flags); }
52 #define CLEARPCGFLAG(uname, lname) \
53 static inline void ClearPageCgroup##uname(struct page_cgroup *pc) \
54 { clear_bit(PCG_##lname, &pc->flags); }
56 #define TESTCLEARPCGFLAG(uname, lname) \
57 static inline int TestClearPageCgroup##uname(struct page_cgroup *pc) \
58 { return test_and_clear_bit(PCG_##lname, &pc->flags); }
60 /* Cache flag is set only once (at allocation) */
61 TESTPCGFLAG(Cache, CACHE)
62 CLEARPCGFLAG(Cache, CACHE)
63 SETPCGFLAG(Cache, CACHE)
65 TESTPCGFLAG(Used, USED)
66 CLEARPCGFLAG(Used, USED)
67 SETPCGFLAG(Used, USED)
69 SETPCGFLAG(AcctLRU, ACCT_LRU)
70 CLEARPCGFLAG(AcctLRU, ACCT_LRU)
71 TESTPCGFLAG(AcctLRU, ACCT_LRU)
72 TESTCLEARPCGFLAG(AcctLRU, ACCT_LRU)
74 static inline int page_cgroup_nid(struct page_cgroup *pc)
76 return page_to_nid(pc->page);
79 static inline enum zone_type page_cgroup_zid(struct page_cgroup *pc)
81 return page_zonenum(pc->page);
84 static inline void lock_page_cgroup(struct page_cgroup *pc)
86 bit_spin_lock(PCG_LOCK, &pc->flags);
89 static inline int trylock_page_cgroup(struct page_cgroup *pc)
91 return bit_spin_trylock(PCG_LOCK, &pc->flags);
94 static inline void unlock_page_cgroup(struct page_cgroup *pc)
96 bit_spin_unlock(PCG_LOCK, &pc->flags);
99 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
102 static inline void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat)
106 static inline struct page_cgroup *lookup_page_cgroup(struct page *page)
111 static inline void page_cgroup_init(void)
115 static inline void __init page_cgroup_init_flatmem(void)
121 #include <linux/swap.h>
123 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
124 extern unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id);
125 extern unsigned short lookup_swap_cgroup(swp_entry_t ent);
126 extern int swap_cgroup_swapon(int type, unsigned long max_pages);
127 extern void swap_cgroup_swapoff(int type);
131 unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id)
137 unsigned short lookup_swap_cgroup(swp_entry_t ent)
143 swap_cgroup_swapon(int type, unsigned long max_pages)
148 static inline void swap_cgroup_swapoff(int type)