Re: Regression in next with use printk_safe buffers in printk
From: Tony Lindgren
Date: Thu Feb 16 2017 - 10:10:24 EST
* Sergey Senozhatsky <sergey.senozhatsky.work@xxxxxxxxx> [170215 20:26]:
> On (02/15/17 20:03), Tony Lindgren wrote:
> > * Sergey Senozhatsky <sergey.senozhatsky.work@xxxxxxxxx> [170215 17:32]:
> > > On (02/15/17 10:01), Tony Lindgren wrote:
> > > [..]
> > > > Below is another issue I noticed caused by commit f975237b7682 that
> > > > I noticed during booting.
> > >
> > > do you mean that with f975237b7682 you _always_ see that illegal RCU
> > > usage warning?
> > Yeah on every boot on devices using cpuidle_coupled.
> does this mean that with the printk-safe patches reverted
> (so, basically, the same conditions module 4 printk patches)
> you don't see illegal RCU usage reports? at the moment I can't
> see any connection between f975237b7682 and RCU usage from idle CPU.
Yes reverting those four patches I listed earlier also makes it go