[PATCH] proc: let task status file print utime and stime.

[KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>]

From: Tatsuhiro Aoshima <tatsu.pc@gmail.com>
Subject: [PATCH] proc: let task status file print utime and stime.

The task status file in proc file system did not contain
user-time and system-time. Thus, users could not get
those information of running task easily. I think
these values should be provived in human readable format.
By this patch, users can get stime and utime very easily.

Signed-off-by: Tatsuhiro Aoshima <tatsu.pc@gmail.com>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
---
 fs/proc/array.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/fs/proc/array.c b/fs/proc/array.c
index 725a650..29afa68 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -162,6 +162,7 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
 	struct fdtable *fdt = NULL;
 	const struct cred *cred;
 	pid_t ppid, tpid;
+	struct timeval utime, stime;
 
 	rcu_read_lock();
 	ppid = pid_alive(p) ?
@@ -173,6 +174,8 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
 			tpid = task_pid_nr_ns(tracer, ns);
 	}
 	cred = get_cred((struct cred *) __task_cred(p));
+	cputime_to_timeval(task_utime(p), &utime);
+	cputime_to_timeval(task_stime(p), &stime);
 	seq_printf(m,
 		"State:\t%s\n"
 		"Tgid:\t%d\n"
@@ -180,13 +183,17 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
 		"PPid:\t%d\n"
 		"TracerPid:\t%d\n"
 		"Uid:\t%d\t%d\t%d\t%d\n"
-		"Gid:\t%d\t%d\t%d\t%d\n",
+		"Gid:\t%d\t%d\t%d\t%d\n"
+		"Utime:\t%lu.%06lu\n"
+		"Stime:\t%lu.%06lu\n",
 		get_task_state(p),
 		task_tgid_nr_ns(p, ns),
 		pid_nr_ns(pid, ns),
 		ppid, tpid,
 		cred->uid, cred->euid, cred->suid, cred->fsuid,
-		cred->gid, cred->egid, cred->sgid, cred->fsgid);
+		cred->gid, cred->egid, cred->sgid, cred->fsgid,
+		(unsigned long) utime.tv_sec, (unsigned long) utime.tv_usec,
+		(unsigned long) stime.tv_sec, (unsigned long) stime.tv_usec);
 
 	task_lock(p);
 	if (p->files)
-- 
1.4.4.4