On Sat, 13 May 2017 00:15:03 +0200 (CEST) Thomas Gleixner <t...@linutronix.de> wrote:
> On Fri, 12 May 2017, Steven Rostedt wrote: > > void get_online_cpus(void) > > { > > +#ifdef CONFIG_LOCKDEP > > + if (current->goc_depth++) > > + return; > > This must be unconditional and not depend on lockdep. The percpu rwsem is > going to deadlock silently otherwise when a writer is waiting .... > After I sent the updated changes to Paul, I realized this. But didn't update it as I turned my attention to seeing if we can still get it done without it. But I'm not convinced that we can yet. I'll reply to Peter's email again later. -- Steve