146 lines
3.5 KiB
C
146 lines
3.5 KiB
C
#ifndef __LINUX_PAGE_CGROUP_H
|
|
#define __LINUX_PAGE_CGROUP_H
|
|
|
|
enum {
|
|
/* flags for mem_cgroup */
|
|
PCG_LOCK, /* Lock for pc->mem_cgroup and following bits. */
|
|
PCG_USED, /* this object is in use. */
|
|
PCG_MIGRATION, /* under page migration */
|
|
__NR_PCG_FLAGS,
|
|
};
|
|
|
|
#ifndef __GENERATING_BOUNDS_H
|
|
#include <generated/bounds.h>
|
|
|
|
#ifdef CONFIG_CGROUP_MEM_RES_CTLR
|
|
#include <linux/bit_spinlock.h>
|
|
|
|
/*
|
|
* Page Cgroup can be considered as an extended mem_map.
|
|
* A page_cgroup page is associated with every page descriptor. The
|
|
* page_cgroup helps us identify information about the cgroup
|
|
* All page cgroups are allocated at boot or memory hotplug event,
|
|
* then the page cgroup for pfn always exists.
|
|
*/
|
|
struct page_cgroup {
|
|
unsigned long flags;
|
|
struct mem_cgroup *mem_cgroup;
|
|
};
|
|
|
|
void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat);
|
|
|
|
#ifdef CONFIG_SPARSEMEM
|
|
static inline void __init page_cgroup_init_flatmem(void)
|
|
{
|
|
}
|
|
extern void __init page_cgroup_init(void);
|
|
#else
|
|
void __init page_cgroup_init_flatmem(void);
|
|
static inline void __init page_cgroup_init(void)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
struct page_cgroup *lookup_page_cgroup(struct page *page);
|
|
struct page *lookup_cgroup_page(struct page_cgroup *pc);
|
|
|
|
#define TESTPCGFLAG(uname, lname) \
|
|
static inline int PageCgroup##uname(struct page_cgroup *pc) \
|
|
{ return test_bit(PCG_##lname, &pc->flags); }
|
|
|
|
#define SETPCGFLAG(uname, lname) \
|
|
static inline void SetPageCgroup##uname(struct page_cgroup *pc)\
|
|
{ set_bit(PCG_##lname, &pc->flags); }
|
|
|
|
#define CLEARPCGFLAG(uname, lname) \
|
|
static inline void ClearPageCgroup##uname(struct page_cgroup *pc) \
|
|
{ clear_bit(PCG_##lname, &pc->flags); }
|
|
|
|
#define TESTCLEARPCGFLAG(uname, lname) \
|
|
static inline int TestClearPageCgroup##uname(struct page_cgroup *pc) \
|
|
{ return test_and_clear_bit(PCG_##lname, &pc->flags); }
|
|
|
|
TESTPCGFLAG(Used, USED)
|
|
CLEARPCGFLAG(Used, USED)
|
|
SETPCGFLAG(Used, USED)
|
|
|
|
SETPCGFLAG(Migration, MIGRATION)
|
|
CLEARPCGFLAG(Migration, MIGRATION)
|
|
TESTPCGFLAG(Migration, MIGRATION)
|
|
|
|
static inline void lock_page_cgroup(struct page_cgroup *pc)
|
|
{
|
|
/*
|
|
* Don't take this lock in IRQ context.
|
|
* This lock is for pc->mem_cgroup, USED, MIGRATION
|
|
*/
|
|
bit_spin_lock(PCG_LOCK, &pc->flags);
|
|
}
|
|
|
|
static inline void unlock_page_cgroup(struct page_cgroup *pc)
|
|
{
|
|
bit_spin_unlock(PCG_LOCK, &pc->flags);
|
|
}
|
|
|
|
#else /* CONFIG_CGROUP_MEM_RES_CTLR */
|
|
struct page_cgroup;
|
|
|
|
static inline void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat)
|
|
{
|
|
}
|
|
|
|
static inline struct page_cgroup *lookup_page_cgroup(struct page *page)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void page_cgroup_init(void)
|
|
{
|
|
}
|
|
|
|
static inline void __init page_cgroup_init_flatmem(void)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_CGROUP_MEM_RES_CTLR */
|
|
|
|
#include <linux/swap.h>
|
|
|
|
#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
|
|
extern unsigned short swap_cgroup_cmpxchg(swp_entry_t ent,
|
|
unsigned short old, unsigned short new);
|
|
extern unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id);
|
|
extern unsigned short lookup_swap_cgroup_id(swp_entry_t ent);
|
|
extern int swap_cgroup_swapon(int type, unsigned long max_pages);
|
|
extern void swap_cgroup_swapoff(int type);
|
|
#else
|
|
|
|
static inline
|
|
unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline
|
|
unsigned short lookup_swap_cgroup_id(swp_entry_t ent)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
swap_cgroup_swapon(int type, unsigned long max_pages)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void swap_cgroup_swapoff(int type)
|
|
{
|
|
return;
|
|
}
|
|
|
|
#endif /* CONFIG_CGROUP_MEM_RES_CTLR_SWAP */
|
|
|
|
#endif /* !__GENERATING_BOUNDS_H */
|
|
|
|
#endif /* __LINUX_PAGE_CGROUP_H */
|