Re: printk meeting at LPC

[Sergey Senozhatsky]

On (09/13/19 15:26), John Ogness wrote:
> 2. A kernel thread will be created for each registered console, each
> responsible for being the sole printers to their respective
> consoles. With this, console printing is _fully_ decoupled from printk()
> callers.

sysrq over serial?

What we currently have is hacky, but, as usual, is a "best effort":

	>> serial driver IRQ

	serial_handle_irq()		[console driver]
	 uart_handle_sysrq_char()
	  handle_sysrq()
	   printk()
	    call_console_drivers()
	     serial_write()		[re-enter console driver]

offloading this to kthread may be unreliable.

	-ss