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shm: trace the amount of locked segment per user

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NAKAMURA Gou
2016-03-10 20:45:57 +09:00
parent 8b5b075f4c
commit e8be52a1ff
3 changed files with 107 additions and 2 deletions
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27
kernel/include/shm.h
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@@ -47,11 +47,14 @@ enum {
SHM_INFO = 14,
};
struct shmlock_user;
struct shmobj {
struct memobj memobj; /* must be first */
int index;
int pgshift;
size_t real_segsz;
struct shmlock_user * user;
struct shmid_ds ds;
struct list_head page_list;
struct list_head chain; /* shmobj_list */
@@ -76,9 +79,33 @@ struct shm_info {
uint64_t swap_successes;
};
struct shmlock_user {
uid_t ruid;
int padding;
size_t locked;
struct list_head chain;
};
extern ihk_spinlock_t shmlock_users_lock_body;
static inline void shmlock_users_lock(void)
{
ihk_mc_spinlock_lock_noirq(&shmlock_users_lock_body);
return;
}
static inline void shmlock_users_unlock(void)
{
ihk_mc_spinlock_unlock_noirq(&shmlock_users_lock_body);
return;
}
void shmobj_list_lock(void);
void shmobj_list_unlock(void);
int shmobj_create_indexed(struct shmid_ds *ds, struct shmobj **objp);
void shmobj_destroy(struct shmobj *obj);
void shmlock_user_free(struct shmlock_user *user);
int shmlock_user_get(uid_t ruid, struct shmlock_user **userp);
#endif /* HEADER_SHM_H */