15b3acc8dSAlexey Dobriyan #include <linux/fs.h> 25b3acc8dSAlexey Dobriyan #include <linux/init.h> 35b3acc8dSAlexey Dobriyan #include <linux/pid_namespace.h> 45b3acc8dSAlexey Dobriyan #include <linux/proc_fs.h> 55b3acc8dSAlexey Dobriyan #include <linux/sched.h> 65b3acc8dSAlexey Dobriyan #include <linux/seq_file.h> 75b3acc8dSAlexey Dobriyan #include <linux/seqlock.h> 85b3acc8dSAlexey Dobriyan #include <linux/time.h> 95b3acc8dSAlexey Dobriyan 105b3acc8dSAlexey Dobriyan #define LOAD_INT(x) ((x) >> FSHIFT) 115b3acc8dSAlexey Dobriyan #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100) 125b3acc8dSAlexey Dobriyan 135b3acc8dSAlexey Dobriyan static int loadavg_proc_show(struct seq_file *m, void *v) 145b3acc8dSAlexey Dobriyan { 155b3acc8dSAlexey Dobriyan int a, b, c; 165b3acc8dSAlexey Dobriyan unsigned long seq; 175b3acc8dSAlexey Dobriyan 185b3acc8dSAlexey Dobriyan do { 195b3acc8dSAlexey Dobriyan seq = read_seqbegin(&xtime_lock); 205b3acc8dSAlexey Dobriyan a = avenrun[0] + (FIXED_1/200); 215b3acc8dSAlexey Dobriyan b = avenrun[1] + (FIXED_1/200); 225b3acc8dSAlexey Dobriyan c = avenrun[2] + (FIXED_1/200); 235b3acc8dSAlexey Dobriyan } while (read_seqretry(&xtime_lock, seq)); 245b3acc8dSAlexey Dobriyan 255b3acc8dSAlexey Dobriyan seq_printf(m, "%d.%02d %d.%02d %d.%02d %ld/%d %d\n", 265b3acc8dSAlexey Dobriyan LOAD_INT(a), LOAD_FRAC(a), 275b3acc8dSAlexey Dobriyan LOAD_INT(b), LOAD_FRAC(b), 285b3acc8dSAlexey Dobriyan LOAD_INT(c), LOAD_FRAC(c), 295b3acc8dSAlexey Dobriyan nr_running(), nr_threads, 305b3acc8dSAlexey Dobriyan task_active_pid_ns(current)->last_pid); 315b3acc8dSAlexey Dobriyan return 0; 325b3acc8dSAlexey Dobriyan } 335b3acc8dSAlexey Dobriyan 345b3acc8dSAlexey Dobriyan static int loadavg_proc_open(struct inode *inode, struct file *file) 355b3acc8dSAlexey Dobriyan { 365b3acc8dSAlexey Dobriyan return single_open(file, loadavg_proc_show, NULL); 375b3acc8dSAlexey Dobriyan } 385b3acc8dSAlexey Dobriyan 395b3acc8dSAlexey Dobriyan static const struct file_operations loadavg_proc_fops = { 405b3acc8dSAlexey Dobriyan .open = loadavg_proc_open, 415b3acc8dSAlexey Dobriyan .read = seq_read, 425b3acc8dSAlexey Dobriyan .llseek = seq_lseek, 435b3acc8dSAlexey Dobriyan .release = single_release, 445b3acc8dSAlexey Dobriyan }; 455b3acc8dSAlexey Dobriyan 465b3acc8dSAlexey Dobriyan static int __init proc_loadavg_init(void) 475b3acc8dSAlexey Dobriyan { 485b3acc8dSAlexey Dobriyan proc_create("loadavg", 0, NULL, &loadavg_proc_fops); 495b3acc8dSAlexey Dobriyan return 0; 505b3acc8dSAlexey Dobriyan } 515b3acc8dSAlexey Dobriyan module_init(proc_loadavg_init); 52