On Wed, Jul 23, 2014 at 11:55:42AM -0700, Linus Torvalds wrote:
> On Wed, Jul 23, 2014 at 11:41 AM, Peter Zijlstra <peterz@infradead.org> wrote:
> >
> > OK, that leaves us agreeing we want to clean that up, but still no
> > closer to explaining WTH happened on Michel's machine. Weird that.
> 
> So looking at that destination pointer value (ffff10043c803e8c), it
> *looks* like a pointer. Almost. If it was 0xffff80.. instead of
> 0xffff10.. it would probably be a fine pointer.
> 
> Can you send me the config? I'm wondering what else might be close to
> that load_balance_mask percpu allocation, that migth perhaps have
> overflowed and written a stray byte into the pointer or something?

Here goes..