On Thu, Jun 19, 2014 at 03:19:39PM -0500, Christoph Lameter wrote:
> On Thu, 19 Jun 2014, Thomas Gleixner wrote:
>
> > Well, no. Look at the callchain:
> >
> > __call_rcu
> > debug_object_activate
> > rcuhead_fixup_activate
> > debug_object_init
> > kmem_cache_alloc
> >
> > So call rcu activates the object, but the object has no reference in
> > the debug objects code so the fixup code is called which inits the
> > object and allocates a reference ....
>
> So we need to init the object in the page struct before the __call_rcu?
And the needed APIs are now in mainline:
void init_rcu_head(struct rcu_head *head);
void destroy_rcu_head(struct rcu_head *head);
Over to you, Christoph! ;-)
Thanx, Paul
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