linux-kernel - Re: [PATCH] rcu,ftrace: Fix ftrace recursion

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Message-ID: <459f3c42-4e18-0a71-fd84-122342bdb4fe@amd.com>
Date:   Tue, 29 Sep 2020 09:43:18 -0500
From:   Kim Phillips <kim.phillips@....com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Paul McKenney <paulmck@...nel.org>
Cc:     linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH] rcu,ftrace: Fix ftrace recursion

On 9/29/20 6:33 AM, Peter Zijlstra wrote:
> 
> Kim reported that perf-ftrace made his box unhappy. It turns out that
> commit:
> 
>   ff5c4f5cad33 ("rcu/tree: Mark the idle relevant functions noinstr")
> 
> removed one too many notrace. Probably due to there not being a helpful
> comment.
> 
> Reinstate the notrace and add a comment to avoid loosing it again.
> 
> Fixes: ff5c4f5cad33 ("rcu/tree: Mark the idle relevant functions noinstr")
> Reported-by: Kim Phillips <kim.phillips@....com>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
> ---

Tested-by: Kim Phillips <kim.phillips@....com>

Thanks,

Kim