Re: Regression in next with use printk_safe buffers in printk

From: Sergey Senozhatsky
Date: Tue Feb 14 2017 - 23:49:22 EST

On (02/14/17 19:29), Peter Zijlstra wrote:
> On Wed, Feb 15, 2017 at 01:56:45AM +0900, Sergey Senozhatsky wrote:
> > that crossed my mind, but I kinda assumed that we do printk() from
> > under tk_core using sched fair, and rt_runtime_lock is from sched rt.
> That's all true; lockdep doesn't care :-) All it knows is that at some
> point those locks nest.


I think I'll get more familiar with the lockdep splats in
coming months :) but it's good (well, so far) that now we
keep lockdep enabled in printk.