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Subject: Re: [RFC][PATCH 02/11] sched: SCHED_DEADLINE policy implementation.
From: Peter Zijlstra <peterz@infradead.org>
To: Raistlin <raistlin@linux.it>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
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Date: Tue, 13 Apr 2010 20:22:18 +0200
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On Sun, 2010-02-28 at 20:17 +0100, Raistlin wrote:
> +++ b/kernel/fork.c
> @@ -937,6 +937,16 @@ SYSCALL_DEFINE1(set_tid_address, int __user *, tidptr)
>         return task_pid_vnr(current);
>  }
>  
> +static void init_task_dl_entity(struct task_struct *p)
> +{
> +       RB_CLEAR_NODE(&p->dl.rb_node);
> +       hrtimer_init(&p->dl.dl_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
> +
> +       p->dl.dl_runtime = p->dl.runtime = 0;
> +       p->dl.dl_deadline = p->dl.deadline = 0;
> +       p->dl.flags = 0;
> +}
> +
>  static void rt_mutex_init_task(struct task_struct *p)
>  {
>         raw_spin_lock_init(&p->pi_lock);
> @@ -1025,6 +1035,8 @@ static struct task_struct *copy_process(unsigned long clone_flags,
>  
>         ftrace_graph_init_task(p);
>  
> +       init_task_dl_entity(p);
> +
>         rt_mutex_init_task(p);
>  

Why doesn't that live in/use sched_fork()?