linux-kernel - Re: [PATCH v1 07/40] perf stat: Avoid segv on counter->name

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Message-ID: <ZErOMy8X2+dE4AKR@kernel.org>
Date:   Thu, 27 Apr 2023 16:34:11 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     "Liang, Kan" <kan.liang@...ux.intel.com>
Cc:     Ian Rogers <irogers@...gle.com>,
        Ahmad Yasin <ahmad.yasin@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Stephane Eranian <eranian@...gle.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Perry Taylor <perry.taylor@...el.com>,
        Samantha Alt <samantha.alt@...el.com>,
        Caleb Biggers <caleb.biggers@...el.com>,
        Weilin Wang <weilin.wang@...el.com>,
        Edward Baker <edward.baker@...el.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Florian Fischer <florian.fischer@...q.space>,
        Rob Herring <robh@...nel.org>,
        Zhengjun Xing <zhengjun.xing@...ux.intel.com>,
        John Garry <john.g.garry@...cle.com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        Sumanth Korikkar <sumanthk@...ux.ibm.com>,
        Thomas Richter <tmricht@...ux.ibm.com>,
        Tiezhu Yang <yangtiezhu@...ngson.cn>,
        Ravi Bangoria <ravi.bangoria@....com>,
        Leo Yan <leo.yan@...aro.org>,
        Yang Jihong <yangjihong1@...wei.com>,
        James Clark <james.clark@....com>,
        Suzuki Poulouse <suzuki.poulose@....com>,
        Kang Minchul <tegongkang@...il.com>,
        Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 07/40] perf stat: Avoid segv on counter->name

Em Thu, Apr 27, 2023 at 03:11:49PM -0400, Liang, Kan escreveu:
> On 2023-04-26 3:00 a.m., Ian Rogers wrote:
> > Switch to use evsel__name that doesn't return NULL for hardware and
> > similar events.
 
> This one should be backport to 6.4. It helps to fix the Segmentation
> fault with default mode.
> https://lore.kernel.org/lkml/2b8768bf-de24-946f-62da-6ed171a5c324@linux.intel.com/
 
> > Signed-off-by: Ian Rogers <irogers@...gle.com>
 
> Reviewed-by: Kan Liang <kan.liang@...ux.intel.com>

Thanks,

I'll pick those before pushing to Linus, I'm mostly waiting for you guys
to come to a resolution on moving forward, which I hope has been reached
with that patch you sent.

- Arnaldo