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

[Sergey Senozhatsky]

On (03/06/19 11:07), Mikulas Patocka wrote:
> This bug only happens if we select large logbuffer (millions of 
> characters). With smaller log buffer, there are messages "** X printk 
> messages dropped", but there's no lockup.
> 
> The kernel apparently puts 2 million characters into a console log buffer, 
> then takes some lock and than tries to write all of them to a slow serial 
> line.

Do you run a preemtible kernel?

	-ss