On Tue, 16 May 2017 09:33:52 +0200 (CEST) Thomas Gleixner <t...@linutronix.de> wrote:
> Darn, forgot about PREEMPT_VOLUNTARY and that excellent changelog does not > mention it either. > > > So if we schedule to the kernel_init() task before we set kthreadd_task > > we'll try and spawn kthreads and OOPS. > > So back to Stevens question. No, we can't set the state earlier than right > before schedule() simply because with PREEMPT preemption _is_ actually > disabled and kernel_kthread() will trigger might_sleep() splats. So a comment in the code mentioning PREEMPT_VOLUNTARY might be advantageous. > > What a mess. Indeed. -- Steve
