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References: <20220127132010.4836-1-changbin.du@gmail.com>
In-Reply-To: <20220127132010.4836-1-changbin.du@gmail.com>
From:   Namhyung Kim <namhyung@kernel.org>
Date:   Tue, 1 Feb 2022 20:47:49 -0800
Message-ID: <CAM9d7cgPhL9roWuJ=ktKRCGQTM824JEvi+Ar5mibCnK9LWku6A@mail.gmail.com>
Subject: Re: [PATCH v2] perf/ftrace: system_wide collection is not effective
 by default
To:     Changbin Du <changbin.du@gmail.com>
Cc:     Arnaldo Carvalho de Melo <acme@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>, Jiri Olsa <jolsa@redhat.com>,
        linux-perf-users <linux-perf-users@vger.kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>
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Hello,

On Thu, Jan 27, 2022 at 5:20 AM Changbin Du <changbin.du@gmail.com> wrote:
>
> The ftrace.target.system_wide must be set before invoking
> evlist__create_maps(), otherwise it has no effect.
>
> Fixes: 53be50282269 ("perf ftrace: Add 'latency' subcommand")
> Signed-off-by: Changbin Du <changbin.du@gmail.com>

Acked-by: Namhyung Kim <namhyung@gmail.com>

Thanks,
Namhyung