From 5168ce2c647f02756803bef7b74906f485491a1c Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Thu, 26 Mar 2009 15:23:53 +0100 Subject: [PATCH] [S390] cputime: initialize per thread timer values on fork Initialize per thread timer values instead of just copying them from the parent. That way it is easily possible to tell how much time a thread spent in user/system context. Doesn't fix a bug, this is just for debugging purposes. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/kernel/process.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c index e0563baa1cf..e6b480625cb 100644 --- a/arch/s390/kernel/process.c +++ b/arch/s390/kernel/process.c @@ -163,6 +163,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long new_stackp, unsigned long unused, struct task_struct *p, struct pt_regs *regs) { + struct thread_info *ti; struct fake_frame { struct stack_frame sf; @@ -214,6 +215,10 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long new_stackp, p->thread.mm_segment = get_fs(); /* Don't copy debug registers */ memset(&p->thread.per_info, 0, sizeof(p->thread.per_info)); + /* Initialize per thread user and system timer values */ + ti = task_thread_info(p); + ti->user_timer = 0; + ti->system_timer = 0; return 0; }