Re: [RT] lockdep munching nr_list_entries like popcorn

Thomas Gleixner
2017-02-16T09:01:21Z

On Thu, 16 Feb 2017, Mike Galbraith wrote:

> On Thu, 2017-02-16 at 09:37 +0100, Thomas Gleixner wrote:
> > On Thu, 16 Feb 2017, Mike Galbraith wrote:
> >
> ...
> > > swapvec_lock? Oodles of 'em? Nope.
> >
> > Well, it's a per cpu lock and the lru_cache_add() variants might be called
> > from a gazillion of different call chains, but yes, it does not make a lot
> > of sense. We'll have a look.
>
> Adding explicit local_irq_lock_init() makes things heaps better, so
> presumably we need better lockdep-foo in DEFINE_LOCAL_IRQ_LOCK().

Bah.