linux-kernel - Re: [RFC PATCH] trace: prevent preemption in perf_ftrace_function

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Message-ID: <20210923232722.4fc6f3fe@oasis.local.home>
Date:   Thu, 23 Sep 2021 23:27:22 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     王贇 <yun.wang@...ux.alibaba.com>
Cc:     Ingo Molnar <mingo@...hat.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] trace: prevent preemption in
 perf_ftrace_function_call()

On Thu, 23 Sep 2021 23:26:19 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> If it can be scheduled, then RCU is definitely watching ;-)

In other words. Nothing ever gets scheduled into a location that RCU is
not watching.

-- Steve