[PATCH] show nr_running and nr_iowait_tasks

[Rik van Riel]

Hi,

this trivial patch, against 2.5-current, exports nr_running
and nr_iowait_tasks in /proc/stat.  With this patch in vmstat
will no longer need to walk all the processes in the system
just to determine the number of running and blocked processes.

please apply,

Rik
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===== fs/proc/proc_misc.c 1.49 vs edited =====
--- 1.49/fs/proc/proc_misc.c	Tue Oct 15 20:32:38 2002
+++ edited/fs/proc/proc_misc.c	Wed Oct 16 18:17:24 2002
@@ -39,6 +39,7 @@
 #include <linux/seq_file.h>
 #include <linux/times.h>
 #include <linux/profile.h>
+#include <linux/blkdev.h>

 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
@@ -404,10 +405,14 @@
 	len += sprintf(page + len,
 		"\nctxt %lu\n"
 		"btime %lu\n"
-		"processes %lu\n",
+		"processes %lu\n"
+		"procs_running %lu\n"
+		"procs_blocked %u\n",
 		nr_context_switches(),
 		xtime.tv_sec - jif / HZ,
-		total_forks);
+		total_forks,
+		nr_running(),
+		atomic_read(&nr_iowait_tasks));

 	return proc_calc_metrics(page, start, off, count, eof, len);
 }