On Fri 2017-01-13 12:53:07, Sergey Senozhatsky wrote:

On (01/13/17 11:52), Sergey Senozhatsky wrote:
[..]

quoted

and we really don't want to cond_resched() when we are in panic.
that's why console_flush_on_panic() sets it to zero explicitly.

console_trylock() checks oops_in_progress, so re-taking the semaphore
when we are in

	panic()
	 console_flush_on_panic()
          console_unlock()
           console_trylock()

should be OK. as well as doing get_console_conditional_schedule() somewhere
in console driver code.

d'oh... no, this is false. console_flush_on_panic() is called after we
bust_spinlocks(0), BUT with local IRQs disabled. so console_trylock()
would still set console_may_schedule to 0.

Ah, you found it yourself.

Best Regards,
Petr