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Date:   Fri, 14 Feb 2020 11:42:45 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
To:     Peter Zijlstra <peterz@infradead.org>
Cc:     linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
        rostedt@goodmis.org, mingo@kernel.org, joel@joelfernandes.org,
        gregkh@linuxfoundation.org, gustavo@embeddedor.com,
        tglx@linutronix.de, paulmck@kernel.org, josh@joshtriplett.org,
        mathieu.desnoyers@efficios.com, jiangshanlai@gmail.com,
        sergey.senozhatsky.work@gmail.com
Subject: Re: [PATCH v2 9/9] perf,tracing: Allow function tracing when !RCU
Message-ID: <20200214024244.GH36551@google.com>
References: <20200212210139.382424693@infradead.org>
 <20200212210750.312024711@infradead.org>
 <20200214022839.GG36551@google.com>
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On (20/02/14 11:28), Sergey Senozhatsky wrote:
> On (20/02/12 22:01), Peter Zijlstra wrote:
> > Since perf is now able to deal with !rcu_is_watching() contexts,
> > remove the restraint.
> > 
> > Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> > ---
> >  kernel/trace/trace_event_perf.c |    2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > --- a/kernel/trace/trace_event_perf.c
> > +++ b/kernel/trace/trace_event_perf.c
> > @@ -477,7 +477,7 @@ static int perf_ftrace_function_register
> >  {
> >  	struct ftrace_ops *ops = &event->ftrace_ops;
> >  
> > -	ops->flags   = FTRACE_OPS_FL_RCU;
> > +	ops->flags   = 0;
> 
> FTRACE_OPS_FL_ENABLED?

No, never mind.

	-ss