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Message-ID: <20200211131046.GR14914@hirez.programming.kicks-ass.net>
Date: Tue, 11 Feb 2020 14:10:46 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: "Paul E. McKenney" <paulmck@...nel.org>
Cc: Steven Rostedt <rostedt@...dmis.org>,
LKML <linux-kernel@...r.kernel.org>,
Ingo Molnar <mingo@...nel.org>,
"Joel Fernandes (Google)" <joel@...lfernandes.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Gustavo A. R. Silva" <gustavo@...eddedor.com>,
Thomas Gleixner <tglx@...utronix.de>,
Josh Triplett <josh@...htriplett.org>,
Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
Lai Jiangshan <jiangshanlai@...il.com>
Subject: Re: [PATCH] tracing/perf: Move rcu_irq_enter/exit_irqson() to perf
trace point hook
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)
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