linux-kernel - Re: [PATCH v2] perf: cs-etm: Improve missing sink warning message

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Message-ID: <1dbd558a-92b7-77ed-1bbe-0f421547bf54@arm.com>
Date:   Tue, 24 Jan 2023 11:08:32 +0000
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     James Clark <james.clark@....com>,
        linux-perf-users@...r.kernel.org, acme@...nel.org
Cc:     linux-kernel@...r.kernel.org,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        John Garry <john.g.garry@...cle.com>,
        Will Deacon <will@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>, coresight@...ts.linaro.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2] perf: cs-etm: Improve missing sink warning message

On 24/01/2023 11:02, James Clark wrote:
> Make the sink error message more similar to the event error message that
> reminds about missing kernel support. The available sinks are also
> determined by the hardware so mention that too.
> 
> Also, usually it's not necessary to specify the sink, so add that as a
> hint.
> 
> Now the error for a made up sink looks like this:
> 
>    $ perf record -e cs_etm/@.../
>    Couldn't find sink "abc" on event cs_etm/@.../.
>    Missing kernel or device support?
> 
>    Hint: An appropriate sink will be picked automatically if one isn't is specified.
> 
> For any error other than ENOENT, the same message as before is
> displayed.
> 
> Signed-off-by: James Clark <james.clark@....com>

Acked-by: Suzuki K Poulose <suzuki.poulose@....com>