From patchwork Sun Oct 31 18:05:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Bristot de Oliveira X-Patchwork-Id: 12595433 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 91BE5C433F5 for ; Sun, 31 Oct 2021 18:07:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7BB6260E54 for ; Sun, 31 Oct 2021 18:07:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231181AbhJaSKF convert rfc822-to-8bit (ORCPT ); Sun, 31 Oct 2021 14:10:05 -0400 Received: from us-smtp-delivery-44.mimecast.com ([205.139.111.44]:56150 "EHLO us-smtp-delivery-44.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230248AbhJaSKD (ORCPT ); Sun, 31 Oct 2021 14:10:03 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-60-KhhkKOWEMq6puXTC2CpiOQ-1; Sun, 31 Oct 2021 14:07:27 -0400 X-MC-Unique: KhhkKOWEMq6puXTC2CpiOQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 339E13630B; Sun, 31 Oct 2021 18:07:26 +0000 (UTC) Received: from x1.com (unknown [10.22.8.92]) by smtp.corp.redhat.com (Postfix) with ESMTP id C960060C17; Sun, 31 Oct 2021 18:07:00 +0000 (UTC) From: Daniel Bristot de Oliveira To: Steven Rostedt Cc: Daniel Bristot de Oliveira , Ingo Molnar , Tom Zanussi , Masami Hiramatsu , Juri Lelli , Clark Williams , John Kacur , Peter Zijlstra , Thomas Gleixner , Sebastian Andrzej Siewior , linux-rt-users@vger.kernel.org, linux-trace-devel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH V9 8/9] tracing/osnoise: Remove STACKTRACE ifdefs from inside functions Date: Sun, 31 Oct 2021 19:05:03 +0100 Message-Id: <3465cca2f28e1ba602a1fc8bdb28d12950b5226e.1635702894.git.bristot@kernel.org> In-Reply-To: References: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=bristot@kernel.org X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org Remove CONFIG_STACKTRACE from inside functions, avoiding compilation problems in the future. Cc: Steven Rostedt Cc: Ingo Molnar Cc: Tom Zanussi Cc: Masami Hiramatsu Cc: Juri Lelli Cc: Clark Williams Cc: John Kacur Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Sebastian Andrzej Siewior Cc: Daniel Bristot de Oliveira Cc: linux-rt-users@vger.kernel.org Cc: linux-trace-devel@vger.kernel.org Cc: linux-kernel@vger.kernel.org Suggested-by: Steven Rostedt Signed-off-by: Daniel Bristot de Oliveira --- kernel/trace/trace_osnoise.c | 44 ++++++++++++++++++++++++------------ 1 file changed, 29 insertions(+), 15 deletions(-) diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c index eb617ccb81f1..a7dadf4bfc5f 100644 --- a/kernel/trace/trace_osnoise.c +++ b/kernel/trace/trace_osnoise.c @@ -646,13 +646,19 @@ __timerlat_dump_stack(struct trace_buffer *buffer, struct trace_stack *fstack, u /* * timerlat_dump_stack - dump a stack trace previously saved */ -static void timerlat_dump_stack(void) +static void timerlat_dump_stack(u64 latency) { struct osnoise_instance *inst; struct trace_buffer *buffer; struct trace_stack *fstack; unsigned int size; + /* + * trace only if latency > print_stack config, if enabled. + */ + if (!osnoise_data.print_stack || osnoise_data.print_stack > latency) + return; + preempt_disable_notrace(); fstack = this_cpu_ptr(&trace_stack); size = fstack->stack_size; @@ -666,8 +672,8 @@ static void timerlat_dump_stack(void) rcu_read_unlock(); preempt_enable_notrace(); } -#else -#define timerlat_dump_stack() do {} while (0) +#else /* CONFIG_STACKTRACE */ +#define timerlat_dump_stack(u64 latency) do {} while (0) #define timerlat_save_stack(a) do {} while (0) #endif /* CONFIG_STACKTRACE */ #endif /* CONFIG_TIMERLAT_TRACER */ @@ -1632,11 +1638,7 @@ static int timerlat_main(void *data) trace_timerlat_sample(&s); -#ifdef CONFIG_STACKTRACE - if (osnoise_data.print_stack) - if (osnoise_data.print_stack <= time_to_us(diff)) - timerlat_dump_stack(); -#endif /* CONFIG_STACKTRACE */ + timerlat_dump_stack(time_to_us(diff)); tlat->tracing_thread = false; if (osnoise_data.stop_tracing_total) @@ -1997,26 +1999,38 @@ static const struct file_operations cpus_fops = { }; #ifdef CONFIG_TIMERLAT_TRACER -/* - * init_timerlat_tracefs - A function to initialize the timerlat interface files - */ -static int init_timerlat_tracefs(struct dentry *top_dir) +#ifdef CONFIG_STACKTRACE +static int init_timerlat_stack_tracefs(struct dentry *top_dir) { struct dentry *tmp; -#ifdef CONFIG_STACKTRACE tmp = tracefs_create_file("print_stack", TRACE_MODE_WRITE, top_dir, &osnoise_print_stack, &trace_min_max_fops); if (!tmp) return -ENOMEM; -#endif + + return 0; +} +#else /* CONFIG_STACKTRACE */ +static int init_timerlat_stack_tracefs(struct dentry *top_dir) +{ + return 0; +} +#endif /* CONFIG_STACKTRACE */ + +/* + * init_timerlat_tracefs - A function to initialize the timerlat interface files + */ +static int init_timerlat_tracefs(struct dentry *top_dir) +{ + struct dentry *tmp; tmp = tracefs_create_file("timerlat_period_us", TRACE_MODE_WRITE, top_dir, &timerlat_period, &trace_min_max_fops); if (!tmp) return -ENOMEM; - return 0; + return init_timerlat_stack_tracefs(top_dir); } #else /* CONFIG_TIMERLAT_TRACER */ static int init_timerlat_tracefs(struct dentry *top_dir)