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

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Message-ID: <Z89acl2ZP4j3iS12@google.com>
Date: Mon, 10 Mar 2025 14:32:34 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Stephen Brennan <stephen.s.brennan@...cle.com>,
	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

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.

> 
> 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>

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