Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / proc / loadavg.c

diff --git a/kernel/fs/proc/loadavg.c b/kernel/fs/proc/loadavg.c
new file mode 100644 (file)
index 0000000..aec66e6
--- /dev/null
+++ b/kernel/fs/proc/loadavg.c
@@ -0,0 +1,45 @@
+#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)
+{
+       unsigned long avnrun[3];
+
+       get_avenrun(avnrun, FIXED_1/200, 0);
+
+       seq_printf(m, "%lu.%02lu %lu.%02lu %lu.%02lu %ld/%d %d\n",
+               LOAD_INT(avnrun[0]), LOAD_FRAC(avnrun[0]),
+               LOAD_INT(avnrun[1]), LOAD_FRAC(avnrun[1]),
+               LOAD_INT(avnrun[2]), LOAD_FRAC(avnrun[2]),
+               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;
+}
+fs_initcall(proc_loadavg_init);