linux-kernel - Re: [PATCH 1/4] perf/ftrace: Revert ("perf/ftrace: Fix double traces of perf on ftrace:function")

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Message-ID: <20171011085754.7ae0f153@gandalf.local.home>
Date:   Wed, 11 Oct 2017 08:57:54 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     mingo@...nel.org, linux-kernel@...r.kernel.org, jolsa@...nel.org,
        zhouchengming1@...wei.com
Subject: Re: [PATCH 1/4] perf/ftrace: Revert ("perf/ftrace: Fix double
 traces of perf on ftrace:function")

On Wed, 11 Oct 2017 09:45:29 +0200
Peter Zijlstra <peterz@...radead.org> wrote:

> Revert commit:
> 
>   75e8387685f6 ("perf/ftrace: Fix double traces of perf on ftrace:function")
> 
> The reason I instantly stumbled on that patch is that it only addresses the
> ftrace situation and doesn't mention the other _5_ places that use this
> interface. It doesn't explain why those don't have the problem and if not, why
> their solution doesn't work for ftrace.
> 
> It doesn't, but this is just putting more duct tape on.
> 
> Cc: Zhou Chengming <zhouchengming1@...wei.com>
> Cc: Jiri Olsa <jolsa@...nel.org>
> Cc: Steven Rostedt (VMware) <rostedt@...dmis.org>
> Cc: Ingo Molnar <mingo@...nel.org>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>

Acked-by: Steven Rostedt (VMware) <rostedt@...dmis.org>

-- Steve