linux-kernel - Re: [RFC PATCH] perf/x86: make perf callchain work without CONFIG_FRAME

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Message-ID: <CACPcB9eV37uuXyKw6KrJhpZM6j4OtjrW1JUixpaS=KpvG41NYQ@mail.gmail.com>
Date:   Fri, 5 Apr 2019 23:21:03 +0800
From:   Kairui Song <kasong@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>, Dave Young <dyoung@...hat.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [RFC PATCH] perf/x86: make perf callchain work without CONFIG_FRAME_POINTER

On Fri, Apr 5, 2019 at 3:17 PM Peter Zijlstra <peterz@...radead.org> wrote:
>
> And you forgot to Cc Josh..
>

Hi, thanks for the reply and Cc more people, I just copies the list
from ./scripts/get_maintainer.pl, will pay more attention next time.

> >
> > Just found with ORC unwinder the perf callchain is unusable, and this
> > seems fixes it well, any suggestion is welcome, thanks!
>
> That whole .direct stuff is horrible crap.
>

Sorry if I did anything dumb, but I didn't find a better way to make
it work so sent this RFC... Would you mind tell me what I'm doing
wrong, or give any suggestion about how should I improve it?

--
Best Regards,
Kairui Song