linux-kernel - Re: [PATCH V2 0/2] perf symbols: Slightly improve module file executable section mappings

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Date: Wed, 7 Feb 2024 21:26:09 -0800
From: Namhyung Kim <namhyung@...nel.org>
To: Adrian Hunter <adrian.hunter@...el.com>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>, Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>, 
	Like Xu <like.xu.linux@...il.com>, linux-kernel@...r.kernel.org, 
	linux-perf-users@...r.kernel.org
Subject: Re: [PATCH V2 0/2] perf symbols: Slightly improve module file
 executable section mappings

Hi Adrian,

On Tue, Feb 6, 2024 at 5:05 AM Adrian Hunter <adrian.hunter@...el.com> wrote:
>
> Hi
>
> Currently perf does not record module section addresses except for
> the .text section. In general that means perf cannot get module section
> mappings correct (except for .text) when loading symbols from a kernel
> module file. (Note using --kcore does not have this issue)
>
> Here are a couple of patches to help shed light upon and slightly improve
> the situation.
>
>
> Changes in V2:
>
>   perf tools: Make it possible to see perf's kernel and module memory mappings
>     - add dump to perf report (if no browser) as well as perf script
>     - add 'perf --debug kmaps' option also to dump kmaps
>
>
> Adrian Hunter (2):
>       perf tools: Make it possible to see perf's kernel and module memory mappings
>       perf symbols: Slightly improve module file executable section mappings

Acked-by: Namhyung Kim <namhyung@...nel.org>

Thanks,
Namhyung

>
>  tools/perf/Documentation/perf.txt |  2 ++
>  tools/perf/builtin-report.c       |  2 ++
>  tools/perf/builtin-script.c       |  3 ++
>  tools/perf/util/debug.c           |  3 ++
>  tools/perf/util/debug.h           |  1 +
>  tools/perf/util/python.c          |  1 +
>  tools/perf/util/session.c         | 11 ++++++
>  tools/perf/util/session.h         |  2 ++
>  tools/perf/util/symbol-elf.c      | 75 +++++++++++++++++++++++++++++++++++++--
>  9 files changed, 98 insertions(+), 2 deletions(-)
>
>
> Regards
> Adrian