[dm-devel] Serial console is causing system lock-up

[Sergey Senozhatsky]

On (03/07/19 09:17), John Ogness wrote:
> > If the serial console is a really slow one and we have a CPU in atomic
> > context spinnig on prb_lock, while the prb_lock is always acquired by
> > other CPUs, then it may look like a lock-up scenario.
> 
> When the console is constantly printing messages, I wouldn't say that
> looks like a lock-up scenario. It looks like the system is busy printing
> critical information to the console (which it is).

What if we have N tasks/CPUs calling printk() simultaneously?

	-ss