On Sat, Aug 09, 2014 at 08:19:20PM +0200, Peter Zijlstra wrote:
> How about we simply assume 'idle' code, as defined by the rcu idle hooks
> are safe? Why do we want to bend over backwards to cover this?

The thing is, we already have the special rcu trace hooks for tracing
inside this rcu-idle section, so why go beyond this now?