On Mon, Oct 10, 2016 at 10:17:16PM +1100, Balbir Singh wrote:
> rest_init()
> {
> ...
> kernel_thread(kernel_init, NULL, CLONE_FS);
> numa_default_policy();
> pid = kernel_thread(kthreadd, NULL, CLONE_FS | CLONE_FILES);
> rcu_read_lock();
> kthreadd_task = find_task_by_pid_ns(pid, &init_pid_ns);
> ...
>
> }
>
> create_worker() needs kthreadd, it wakes up kthreadd in
> kthread_create_on_node,
> workqueue_init() is called from kernel_init() , but kthreadd is created after
> the call to kernel_init(), so its touch and go
But the first thing kernel_init_freeable() does is
wait_for_completion(&kthreadd_done).
Thanks.
--
tejun
