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