# Re: \[PATCH\] mm/page\_alloc: Wait for oom\_lock before retrying.

- From: Sergey Senozhatsky \<hidden\>
- Date: 2017-01-13 03:52:56 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2017/01/4911418
- Thread: https://ratatoskr.run/linux-mm/2016/12/6482637/t.md

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

	-ss
```