Messages in this thread | | | Date | Tue, 13 Apr 2010 17:13:06 -0700 (PDT) | Subject | Re: Weird rcu lockdep warning | From | David Miller <> |
| |
From: Frederic Weisbecker <fweisbec@gmail.com> Date: Wed, 14 Apr 2010 02:02:27 +0200
> I just have a guess though.... > This seems to always happen from NMI path, and lockdep is disabled on NMI. > I suspect the lock_acquire() performed by rcu_read_lock() is just ignored > and then the rcu_read_lock_held() check has the wrong result...
Yeah, I bet that's it too.
lock_is_held() can't return anything meaningful while lockdep is disabled, which it is during NMIs.
| |