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[2620:137:e000::3:2]) by mx.google.com with ESMTPS id t185-20020a6381c2000000b00565f01b9403si2242358pgd.883.2023.10.03.14.40.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Oct 2023 14:40:52 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:2 as permitted sender) client-ip=2620:137:e000::3:2; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:2 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by agentk.vger.email (Postfix) with ESMTP id 564A780C479E; Tue, 3 Oct 2023 14:40:44 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at agentk.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241261AbjJCVke (ORCPT + 99 others); Tue, 3 Oct 2023 17:40:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44314 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232084AbjJCVkc (ORCPT ); Tue, 3 Oct 2023 17:40:32 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 721E6A1; Tue, 3 Oct 2023 14:40:25 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0F2EDC433C8; Tue, 3 Oct 2023 21:40:23 +0000 (UTC) Date: Tue, 3 Oct 2023 17:41:29 -0400 From: Steven Rostedt To: Ross Zwisler Cc: linux-kernel@vger.kernel.org, Ross Zwisler , Mark Rutland , Masami Hiramatsu , Mauro Carvalho Chehab , linux-media@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Daniel Almeida , Hans Verkuil Subject: Re: [PATCH] visl: use canonical ftrace path Message-ID: <20231003174129.11c79c18@gandalf.local.home> In-Reply-To: <20230829204600.3210276-2-zwisler@kernel.org> References: <20230829204600.3210276-2-zwisler@kernel.org> X-Mailer: Claws Mail 3.19.1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-0.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on agentk.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (agentk.vger.email [0.0.0.0]); Tue, 03 Oct 2023 14:40:44 -0700 (PDT) Could this go through the linux-media tree, or if you give it an Ack, I'll take it through the tracing tree. -- Steve On Tue, 29 Aug 2023 14:46:01 -0600 Ross Zwisler wrote: > From: Ross Zwisler > > The canonical location for the tracefs filesystem is at /sys/kernel/tracing. > > But, from Documentation/trace/ftrace.rst: > > Before 4.1, all ftrace tracing control files were within the debugfs > file system, which is typically located at /sys/kernel/debug/tracing. > For backward compatibility, when mounting the debugfs file system, > the tracefs file system will be automatically mounted at: > > /sys/kernel/debug/tracing > > Update the visl decoder driver documentation to use this tracefs path. > > Signed-off-by: Ross Zwisler > --- > Documentation/admin-guide/media/visl.rst | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/Documentation/admin-guide/media/visl.rst b/Documentation/admin-guide/media/visl.rst > index 7d2dc78341c9..4328c6c72d30 100644 > --- a/Documentation/admin-guide/media/visl.rst > +++ b/Documentation/admin-guide/media/visl.rst > @@ -78,7 +78,7 @@ The trace events are defined on a per-codec basis, e.g.: > > .. code-block:: bash > > - $ ls /sys/kernel/debug/tracing/events/ | grep visl > + $ ls /sys/kernel/tracing/events/ | grep visl > visl_fwht_controls > visl_h264_controls > visl_hevc_controls > @@ -90,13 +90,13 @@ For example, in order to dump HEVC SPS data: > > .. code-block:: bash > > - $ echo 1 > /sys/kernel/debug/tracing/events/visl_hevc_controls/v4l2_ctrl_hevc_sps/enable > + $ echo 1 > /sys/kernel/tracing/events/visl_hevc_controls/v4l2_ctrl_hevc_sps/enable > > The SPS data will be dumped to the trace buffer, i.e.: > > .. code-block:: bash > > - $ cat /sys/kernel/debug/tracing/trace > + $ cat /sys/kernel/tracing/trace > video_parameter_set_id 0 > seq_parameter_set_id 0 > pic_width_in_luma_samples 1920