19 #define LENGTH (256UL*1024*1024)  macro
36 static void write_bytes(char *addr, size_t length)  in write_bytes()  argument
40 	for (i = 0; i < length; i++)  in write_bytes()
44 static int read_bytes(char *addr, size_t length)  in read_bytes()  argument
49 	for (i = 0; i < length; i++)  in read_bytes()
61 	size_t length = LENGTH;  in main()  local
66 		length = atol(argv[1]) << 20;  in main()
77 	printf("Mapping %lu Mbytes\n", (unsigned long)length >> 20);  in main()
79 	addr = mmap(ADDR, length, PROTECTION, flags, -1, 0);  in main()
87 	write_bytes(addr, length);  in main()
88 	ret = read_bytes(addr, length);  in main()
90 	/* munmap() length of MAP_HUGETLB memory must be hugepage aligned */  in main()
91 	if (munmap(addr, length)) {  in main()