Re: [RFC][PATCHv6 00/12] printk: introduce printing kernel thread

Sergey Senozhatsky
2017-12-28T10:06:31Z

On (12/28/17 15:48), Sergey Senozhatsky wrote:
[..]
> and I'm actually thinking about returning back the old vprintk_emit()
> behavior
>
> vprintk_emit()
> {
> + preempt_disable();
> if (console_trylock())
> console_unlock();
> + preempt_enable();
> }

but am not going to.
it's outside of printk_kthread scope. and, besides, not every CPU which
is looping on console_unlock() came there via printk(). so by disabling
preemption in console_unlock() we cover more cases.

-ss