linux-kernel - Re: [PATCH v3 0/3] Support .gnu

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Message-ID: <874j00wizb.fsf@oracle.com>
Date: Mon, 10 Mar 2025 16:42:32 -0700
From: Stephen Brennan <stephen.s.brennan@...cle.com>
To: Namhyung Kim <namhyung@...nel.org>,
        Arnaldo Carvalho de Melo
 <acme@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        "Liang, Kan"
 <kan.liang@...ux.intel.com>,
        linux-perf-users@...r.kernel.org,
        James Clark
 <james.clark@...aro.org>, Ian Rogers <irogers@...gle.com>,
        Alexander
 Shishkin <alexander.shishkin@...ux.intel.com>,
        Chaitanya S Prakash
 <chaitanyas.prakash@....com>,
        linux-kernel@...r.kernel.org, Jiri Olsa
 <jolsa@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Athira Rajeev
 <atrajeev@...ux.vnet.ibm.com>
Subject: Re: [PATCH v3 0/3] Support .gnu_debugdata for symbols in perf

Namhyung Kim <namhyung@...nel.org> writes:
> On Mon, Mar 10, 2025 at 12:52:40PM -0300, Arnaldo Carvalho de Melo wrote:
>> On Fri, Mar 07, 2025 at 03:22:00PM -0800, Stephen Brennan wrote:
>> > Hello all,
>> >
>> > This series adds the ability to read symbols from the ".gnu_debugdata" section
>> > of DSOs. More details are the cover letter of v1. This only has one small change
>> > from v2: it adds the missing entry in dso__symtab_origin(). Its lack resulted in
>> > truncating the output of symbols in "perf report -v" -- thanks to Arnaldo for
>> > testing and catching that.
>> >
>> > v2: https://lore.kernel.org/linux-perf-users/20250220185512.3357820-1-stephen.s.brennan@oracle.com/
>> > v1: https://lore.kernel.org/linux-perf-users/20250213190542.3249050-1-stephen.s.brennan@oracle.com/
>> >
>> > Stephen Brennan (3):
>> >   tools: perf: add dummy functions for !HAVE_LZMA_SUPPORT
>> >   tools: perf: add LZMA decompression from FILE
>> >   tools: perf: support .gnu_debugdata for symbols
>> 
>> Next time please follow the convention on subject lines in tools/perf:
>> 
>> 36e7748d33bf6a82 (perf-tools-next/perf-tools-next) perf tests: Fix data symbol test with LTO builds
>> e1f5bb18a7b25cac perf report: Fix memory leaks in the hierarchy mode
>> e242df05ee5f2ab0 perf report: Use map_symbol__copy() when copying callchains
>> 4c3f09e35ca999f6 perf annotate: Return errors from disasm_line__parse_powerpc()
>> dab8c32ece27c7d8 perf annotate: Add annotation_options.disassembler_used
>> b0920abe0d529101 perf report: Do not process non-JIT BPF ksymbol events
>> 2c744f38da7aeae7 perf test: Fix leak in "Synthesize attr update" test
>> 41453107bfc30083 perf machine: Fix insertion of PERF_RECORD_KSYMBOL related kernel maps
>> e0e4e0b8b7fabd8c perf maps: Add missing map__set_kmap_maps() when replacing a kernel map
>> 0d11fab32714a2da perf maps: Fixup maps_by_name when modifying maps_by_address
>> f7a46e028c394cd4 perf machine: Fixup kernel maps ends after adding extra maps
>> 25d9c0301d36f4d8 perf maps: Set the kmaps for newly created/added kernel maps
>> 99deaf5578cd768f perf maps: Introduce map__set_kmap_maps() for kernel maps
>> 74fb903b212925ca perf script: Fix output type for dynamically allocated core PMU's
>> 957d194163bf983d perf bench: Fix perf bench syscall loop count
>> b627b443ccfbdd2c perf test: Simplify data symbol test
>> f04c7ef35256beea perf test: Add timeout to datasym workload
>> 15bcfb96d0ddbc1b perf test: Add trace record and replay test
>> 38672c5033c3aebc perf test: Skip perf trace tests when running as non-root
>> 3fb29a7514e727ca perf test: Skip perf probe tests when running as non-root
>> ⬢ [acme@...lbox perf-tools-next]$
>> 
>> I.e. perf, followed by the tool or class (machine, maps, etc), followed
>> by : and then the summary, starting with a capital letter.
>
> Yep, I can fix them this time but please follow the convention next
> time.

Thank you for the fix-up! I will use that style going forward.

>> 
>> I retested and everything looks great, so please add my:
>> 
>> Reviewed-by: Arnaldo Carvalho de Melo <acme@...hat.com>
>> Tested-by: Arnaldo Carvalho de Melo <acme@...hat.com>

And thanks Arnaldo for the test & review!

Stephen

> Thanks for the review!
> Namhyung
>
>> 
>> >  tools/perf/util/compress.h   |  20 +++++++
>> >  tools/perf/util/dso.c        |   3 +
>> >  tools/perf/util/dso.h        |   1 +
>> >  tools/perf/util/lzma.c       |  29 ++++++----
>> >  tools/perf/util/symbol-elf.c | 106 ++++++++++++++++++++++++++++++++++-
>> >  tools/perf/util/symbol.c     |   2 +
>> >  6 files changed, 148 insertions(+), 13 deletions(-)
>> > 
>> > -- 
>> > 2.43.5