[PATCH 1/3] de_thread: mt-exec should update ->real_start_time

From: Oleg Nesterov
Date: Mon Jun 10 2013 - 14:43:24 EST

924b42d5 "Use boot based time for process start time and boot
time in /proc" updated copy_process/do_task_stat but forgot
about de_thread(). This breaks "ps axOT" if a sub-thread execs.

Note: I think that task->start_time should die.

Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
fs/exec.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/fs/exec.c b/fs/exec.c
index 00eaba7..aeace12 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -930,6 +930,7 @@ static int de_thread(struct task_struct *tsk)
* also take its birthdate (always earlier than our own).
tsk->start_time = leader->start_time;
+ tsk->real_start_time = leader->real_start_time;

BUG_ON(!same_thread_group(leader, tsk));

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