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[2620:137:e000::1:20]) by mx.google.com with ESMTP id hk12-20020a17090b224c00b0021942473a5fsi15835472pjb.122.2023.01.11.07.02.28; Wed, 11 Jan 2023 07:02:41 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238692AbjAKO7R (ORCPT + 99 others); Wed, 11 Jan 2023 09:59:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35082 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239528AbjAKO6q (ORCPT ); Wed, 11 Jan 2023 09:58:46 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F1EF0A1A3; Wed, 11 Jan 2023 06:58:45 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id AD272B81C0B; Wed, 11 Jan 2023 14:58:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6E0F0C433EF; Wed, 11 Jan 2023 14:58:43 +0000 (UTC) Received: from rostedt by gandalf.local.home with local (Exim 4.96) (envelope-from ) id 1pFcYs-000M6f-17; Wed, 11 Jan 2023 09:58:42 -0500 Message-ID: <20230111145636.450953217@goodmis.org> User-Agent: quilt/0.66 Date: Wed, 11 Jan 2023 09:56:36 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org Cc: Masami Hiramatsu , Andrew Morton , Ross Zwisler Subject: [PATCH 0/4] tracing: Addition of tracing instances via kernel command line X-Spam-Status: No, score=-6.7 required=5.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1754738838346205114?= X-GMAIL-MSGID: =?utf-8?q?1754738838346205114?= Instance creation can happen with the bootconfig but there's currently no way to create and enable instances via the normal command line. This series fixes that. trace_instance=foo,sched_switch,sched_waking ftrace_boot_snapshot=foo The above creates a "foo" instance at early start up and enables the sched_switch and sched_waking events. Then at the end of boot up a snapshot is taken so that user space does not overwrite the boot up data. Steven Rostedt (Google) (4): tracing: Add creation of instances at boot command line tracing: Add enabling of events to boot instances tracing: Add trace_array_puts() to write into instance tracing: Allow boot instances to have snapshot buffers ---- Documentation/admin-guide/kernel-parameters.txt | 29 +++++ include/linux/trace.h | 13 ++ kernel/trace/trace.c | 159 +++++++++++++++++++++--- kernel/trace/trace.h | 2 + kernel/trace/trace_events.c | 9 +- 5 files changed, 190 insertions(+), 22 deletions(-)