linux-kernel - Re: [PATCH v2 0/4] Tidy up symbol end fixup

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Date:   Tue, 12 Apr 2022 09:20:51 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     John Garry <john.garry@...wei.com>, Will Deacon <will@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        James Clark <james.clark@....com>,
        Alexandre Truong <alexandre.truong@....com>,
        German Gomez <german.gomez@....com>,
        Ian Rogers <irogers@...gle.com>,
        Dave Marchevsky <davemarchevsky@...com>,
        Song Liu <songliubraving@...com>,
        Ravi Bangoria <ravi.bangoria@....com>,
        Li Huafei <lihuafei1@...wei.com>,
        Martin Liška <mliska@...e.cz>,
        William Cohen <wcohen@...hat.com>,
        Riccardo Mancini <rickyman7@...il.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Thomas Richter <tmricht@...ux.ibm.com>,
        Lexi Shao <shaolexi@...wei.com>,
        Remi Bernon <rbernon@...eweavers.com>,
        Michael Petlan <mpetlan@...hat.com>,
        Denis Nikitin <denik@...omium.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH v2 0/4] Tidy up symbol end fixup

On Tue, Apr 12, 2022 at 8:48 AM Ian Rogers <irogers@...gle.com> wrote:
>
> Fixing up more symbol ends as introduced in:
> https://lore.kernel.org/lkml/20220317135536.805-1-mpetlan@redhat.com/
> caused perf annotate to run into memory limits - every symbol holds
> all the disassembled code in the annotation, and so making symbols
> ends further away dramatically increased memory usage (40MB to
>  >1GB). Modify the symbol end logic so that special kernel cases aren't
> applied in the common case.
>
> v2. Drops a merged patch. Fixes a build issue with libbfd enabled.
>
> Ian Rogers (4):
>   perf symbols: Always do architecture specific fixups
>   perf symbols: Add is_kernel argument to fixup end
>   perf symbol: By default only fix zero length symbols
>   perf symbols: More specific architecture end fixing
>
>  tools/perf/arch/arm64/util/machine.c   | 14 +++++++++-----
>  tools/perf/arch/powerpc/util/machine.c | 10 +++++++---
>  tools/perf/arch/s390/util/machine.c    | 12 ++++++++----
>  tools/perf/util/symbol-elf.c           |  2 +-
>  tools/perf/util/symbol.c               | 16 +++++++++-------
>  tools/perf/util/symbol.h               |  4 ++--
>  6 files changed, 36 insertions(+), 22 deletions(-)

Missed the:

Signed-off-by: Ian Rogers <irogers@...gle.com>

Thanks,
Ian

> --
> 2.35.1.1178.g4f1659d476-goog
>