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

- From: Petr Mladek \<pmladek@suse.com\>
- Date: 2017-01-13 11:15:34 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2017/01/4911670
- Thread: https://ratatoskr.run/linux-mm/2016/12/6482637/t.md

```text
On Fri 2017-01-13 12:53:07, Sergey Senozhatsky wrote:
> 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.

Ah, you found it yourself.

Best Regards,
Petr
```