32 	char *cmd = "cat /proc/meminfo | grep -i memfree | grep -o '[0-9]*'";  in read_memory_info()
43 	cmd = "cat /proc/meminfo | grep -i hugepagesize | grep -o '[0-9]*'";  in read_memory_info()
62 	fd = open("/proc/sys/vm/compact_unevictable_allowed",  in prereq()
66 		       "/proc/sys/vm/compact_unevictable_allowed\n");  in prereq()
72 		       "/proc/sys/vm/compact_unevictable_allowed\n");  in prereq()
95 	fd = open("/proc/sys/vm/nr_hugepages", O_RDWR | O_NONBLOCK);  in check_compaction()
97 		perror("Failed to open /proc/sys/vm/nr_hugepages");  in check_compaction()
102 		perror("Failed to read from /proc/sys/vm/nr_hugepages");  in check_compaction()
108 		perror("Failed to write 0 to /proc/sys/vm/nr_hugepages\n");  in check_compaction()
117 		perror("Failed to write 100000 to /proc/sys/vm/nr_hugepages\n");  in check_compaction()
124 		perror("Failed to re-read from /proc/sys/vm/nr_hugepages\n");  in check_compaction()
147 		perror("Failed to write value to /proc/sys/vm/nr_hugepages\n");  in check_compaction()
173 		       "set to 1 or couldn't read the proc file.\n"  in main()