From: Yafang Shao <laoar.shao@gmail.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: "Paul E. McKenney" <paulmck@linux.ibm.com>,
mingo@redhat.com, Peter Zijlstra <peterz@infradead.org>,
josh@joshtriplett.org,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
jiangshanlai@gmail.com, joel@joelfernandes.org,
LKML <linux-kernel@vger.kernel.org>,
shaoyafang@didiglobal.com
Subject: Re: [PATCH v2 3/3] rcu: validate arguments for rcu tracepoints
Date: Wed, 27 Mar 2019 09:17:45 +0800 [thread overview]
Message-ID: <CALOAHbCZ7Bppb8q5=b=QG4g+uZu4EdKQZcME346OJPiCPsQngA@mail.gmail.com> (raw)
In-Reply-To: <20190326112958.2668a4a1@gandalf.local.home>
On Tue, Mar 26, 2019 at 11:30 PM Steven Rostedt <rostedt@goodmis.org> wrote:
>
> On Tue, 26 Mar 2019 08:18:15 -0700
> "Paul E. McKenney" <paulmck@linux.ibm.com> wrote:
>
> > On Tue, Mar 26, 2019 at 08:13:11PM +0800, Yafang Shao wrote:
> > > When CONFIG_RCU_TRACE is not set, all these tracepoints are defined as
> > > do-nothing macro.
> > > We'd better make those inline functions that take proper arguments.
> > >
> > > As RCU_TRACE() is defined as do-nothing marco as well when
> > > CONFIG_RCU_TRACE is not set, so we can clean it up.
> >
> > How about this for the commit log?
> >
> > Unless the CONFIG_RCU_TRACE kconfig option is set, almost all
> > of RCU's tracepoints are defined as empty macros. It would
> > be better if these tracepoints could instead be empty inline
> > functions with proper arguments and type checking. It would
> > also be good to get rid of the RCU_TRACE() macro, which
> > compiles its argument in CONFIG_RCU_TRACE=y kernels and
> > omits them otherwise.
> >
> > This commit therefore creates a TRACE_EVENT_RCU macro that
> > is defined as TRACE_EVENT in CONFIG_RCU_TRACE=y kernels and
> > as the new TRACE_EVENT_NOP otherwise, which allows the
> > empty macros and the RCU_TRACE() macro to be eliminated.
> >
> > With that:
> >
> > Reviewed-by: Paul E. McKenney <paulmck@linux.ibm.com>
>
> Yafang,
>
> If you are OK with the above changes, I'll take this patch with the
> updated change log.
>
Hi Steve,
This new changelog is OK by me.
Pls. take it.
Thanks
Yafang
prev parent reply other threads:[~2019-03-27 1:18 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-26 12:13 [PATCH v2 0/3] tracing: introduce TRACE_EVENT_NOP and use it Yafang Shao
2019-03-26 12:13 ` [PATCH v2 1/3] tracing: introduce TRACE_EVENT_NOP() Yafang Shao
2019-03-26 12:13 ` [PATCH v2 2/3] sched/fair: do not expose some tracepoints to user if CONFIG_SCHEDSTATS is not set Yafang Shao
2019-03-26 12:21 ` Steven Rostedt
2019-04-01 10:31 ` Peter Zijlstra
2019-03-26 12:13 ` [PATCH v2 3/3] rcu: validate arguments for rcu tracepoints Yafang Shao
2019-03-26 12:22 ` Steven Rostedt
2019-03-26 15:18 ` Paul E. McKenney
2019-03-26 15:29 ` Steven Rostedt
2019-03-27 1:17 ` Yafang Shao [this message]
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