#include <linux/fs.h> #include <linux/init.h> #include <linux/pid_namespace.h> #include <linux/proc_fs.h> #include <linux/sched.h> #include <linux/seq_file.h> #include <linux/seqlock.h> #include <linux/time.h> #define LOAD_INT(x) ((x) >> FSHIFT) #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100) static int loadavg_proc_show(struct seq_file *m, void *v) { int a, b, c; unsigned long seq; do { seq = read_seqbegin(&xtime_lock); a = avenrun[0] + (FIXED_1/200); b = avenrun[1] + (FIXED_1/200); c = avenrun[2] + (FIXED_1/200); } while (read_seqretry(&xtime_lock, seq)); seq_printf(m, "%d.%02d %d.%02d %d.%02d %ld/%d %d\n", LOAD_INT(a), LOAD_FRAC(a), LOAD_INT(b), LOAD_FRAC(b), LOAD_INT(c), LOAD_FRAC(c), nr_running(), nr_threads, task_active_pid_ns(current)->last_pid); return 0; } static int loadavg_proc_open(struct inode *inode, struct file *file) { return single_open(file, loadavg_proc_show, NULL); } static const struct file_operations loadavg_proc_fops = { .open = loadavg_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static int __init proc_loadavg_init(void) { proc_create("loadavg", 0, NULL, &loadavg_proc_fops); return 0; } module_init(proc_loadavg_init);