1 #ifndef _MEM_H
2 #define _MEM_H
3 #include "config.h"
4 #include "tst_test.h"
5
6 #if defined(__powerpc__) || defined(__powerpc64__)
7 #define MAXNODES 256
8 #else
9 #define MAXNODES 512
10 #endif
11 #define MB (1UL<<20)
12 #define KB (1UL<<10)
13 #define PATH_SYS_SYSTEM "/sys/devices/system"
14 #define PATH_SYSVM "/proc/sys/vm/"
15 #define PATH_MEMINFO "/proc/meminfo"
16 #define BITS_PER_LONG (8 * sizeof(long))
17
set_node(unsigned long * array,unsigned int node)18 static inline void set_node(unsigned long *array, unsigned int node)
19 {
20 array[node / BITS_PER_LONG] |= 1UL << (node % BITS_PER_LONG);
21 }
22
clean_node(unsigned long * array)23 static inline void clean_node(unsigned long *array)
24 {
25 unsigned int i;
26
27 for (i = 0; i < MAXNODES / BITS_PER_LONG; i++)
28 array[i] &= 0UL;
29 }
30
31 /* OOM */
32
33 #define LENGTH (3UL<<30)
34 #define TESTMEM (1UL<<30)
35 #define NORMAL 1
36 #define MLOCK 2
37 #define KSM 3
38
39 long overcommit;
40 void oom(int testcase, int lite, int retcode, int allow_sigkill);
41 void testoom(int mempolicy, int lite, int retcode, int allow_sigkill);
42
43 /* KSM */
44
45 #define PATH_KSM "/sys/kernel/mm/ksm/"
46
47 void create_same_memory(int size, int num, int unit);
48 void save_max_page_sharing(void);
49 void restore_max_page_sharing(void);
50 void test_ksm_merge_across_nodes(unsigned long nr_pages);
51
52 /* THP */
53
54 #define PATH_THP "/sys/kernel/mm/transparent_hugepage/"
55 #define PATH_KHPD PATH_THP "khugepaged/"
56
57 /* HUGETLB */
58
59 #define PATH_HUGEPAGES "/sys/kernel/mm/hugepages/"
60 #define PATH_SHMMAX "/proc/sys/kernel/shmmax"
61
62 void check_hugepage(void);
63 void write_memcg(void);
64
65 /* cpuset/memcg */
66
67 #define CPATH "/dev/cpuset"
68 #define CPATH_NEW CPATH "/1"
69 #define MEMCG_PATH "/dev/cgroup"
70 #define MEMCG_PATH_NEW MEMCG_PATH "/1"
71 #define MEMCG_LIMIT MEMCG_PATH_NEW "/memory.limit_in_bytes"
72 #define MEMCG_SW_LIMIT MEMCG_PATH_NEW "/memory.memsw.limit_in_bytes"
73 #if HAVE_SYS_EVENTFD_H
74 #define PATH_OOMCTRL MEMCG_PATH_NEW "/memory.oom_control"
75 #define PATH_EVTCTRL MEMCG_PATH_NEW "/cgroup.event_control"
76 #endif
77
78 void read_cpuset_files(char *prefix, char *filename, char *retbuf);
79 void write_cpuset_files(char *prefix, char *filename, char *buf);
80 void write_cpusets(long nd);
81 void mount_mem(char *name, char *fs, char *options, char *path, char *path_new);
82 void umount_mem(char *path, char *path_new);
83
84 /* shared */
85 unsigned int get_a_numa_node(void);
86 int path_exist(const char *path, ...);
87 void set_sys_tune(char *sys_file, long tune, int check);
88 long get_sys_tune(char *sys_file);
89
90 void update_shm_size(size_t *shm_size);
91
92 /* MMAP */
93 int range_is_mapped(unsigned long low, unsigned long high);
94 #endif
95