linux-kernel - Re: [PATCH V6 08/15] ftrace: Add perf text poke events for ftrace trampolines

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Message-ID: <20200428164710.GE16910@hirez.programming.kicks-ass.net>
Date:   Tue, 28 Apr 2020 18:47:10 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Leo Yan <leo.yan@...aro.org>, Jiri Olsa <jolsa@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH V6 08/15] ftrace: Add perf text poke events for ftrace
 trampolines

On Mon, Apr 27, 2020 at 02:34:42PM -0400, Steven Rostedt wrote:
> Arnaldo deals with the userspace perf code. This looks like it needs to go
> through the x86 tree.

Sometimes, when a series crosses both, it'll go through either tree.

I'm fine with picking up the kernel bits I suppose, but then we need to
be careful to have them land in order or something. Whatever people
want.