Re: [PATCH] tracing/perf: Move rcu_irq_enter/exit_irqson() to perf trace point hook

[Paul E. McKenney]

On Tue, Feb 11, 2020 at 02:10:46PM +0100, Peter Zijlstra wrote:
> On Tue, Feb 11, 2020 at 04:59:29AM -0800, Paul E. McKenney wrote:
> 
> > However, a quick grep for NMI_MASK didn't show me the NMI_MASK bit
> > getting set.  Help?
> 
> | #define nmi_enter()						\
> | 	do {							\
> | 		arch_nmi_enter();				\
> | 		printk_nmi_enter();				\
> | 		lockdep_off();					\
> | 		ftrace_nmi_enter();				\
> | 		BUG_ON(in_nmi());				\
> | 		preempt_count_add(NMI_OFFSET + HARDIRQ_OFFSET);	\
> 
> 		^^^^ right there
> 
> | 		rcu_nmi_enter();				\
> | 		trace_hardirq_enter();				\
> | 	} while (0)

Color me blind, and thank you!

							Thanx, Paul