On Thu, 19 Jun 2014, 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? Looks like RCU is lazily relying on the state callback to initialize the objects. There is an unused debug_init_rcu_head() inline in kernel/rcu/update.c Paul???? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>