Re: [RFC PATCH 2/4] sched: Use traced preempt count operations to toggle PREEMPT_ACTIVE

Peter Zijlstra
2015-01-29T03:41:09Z

On Wed, Jan 28, 2015 at 01:24:10AM +0100, Frederic Weisbecker wrote:
> d1f74e20b5b064a130cd0743a256c2d3cfe84010 turned PREEMPT_ACTIVE modifiers
> to use raw untraced preempt count operations. Meanwhile this prevents
> from debugging and tracing preemption disabled if we pull that
> responsibility to schedule() callers (see following patches).
>
Why do you care anyhow? The trace format has the preempt count in, so
any change is obvious.