From nobody Tue Dec 2 02:31:58 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4B8181DDC1B; Wed, 19 Nov 2025 00:21:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763511702; cv=none; b=I5hCaFwIXZu9CQ1TTr5hVG4vmea+XDu4RK5ZmPcxLT+JUWEYapTD9tu8uGhxFqSxAiI57oxKeaXoKUMsVX71jFcO4pjSH4YmAzqYMmlI4opgQMyQBiz0KMt7oPhJaWYc6xc3fVW2CGnLg8vVlHL+mAOTYUA2ghlq8o3sQt/kfgQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763511702; c=relaxed/simple; bh=Xamqltl9I93urByq8l6HdNFbrifOItmvbJjAoJlor/U=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=JddAxe0RJdbdXGx+UoR9WBO4w9vdXVGPC6IthCV8dwruzZ9uvMEXuuU4OHV3YoofzVIW2n/4c6dAQS9LNZa60H/uSwQz06MQFHNGy8QN+q4p3MhvIvD2QJgXzRMxcGmVts3iYINqUIZHeu9fBzJP7gAih/pY/zKIQMbc9zNyVFY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=W7TofsGg; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="W7TofsGg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1C4E8C4CEF5; Wed, 19 Nov 2025 00:21:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763511701; bh=Xamqltl9I93urByq8l6HdNFbrifOItmvbJjAoJlor/U=; h=From:To:Cc:Subject:Date:From; b=W7TofsGgOvMhtJID2EPIWaUqGN9FmDzAOr6LQqHoPu1Cksdp4wUsIPMLOubOO2kd+ FohTWK/674jhm0XX32oAfgwOO8P0lPSUkJrTxGLLlrQHAzHQ8lRvmQ0Yp6w0lXzElg 9GqpdLYkkx9FiR23TkA3lA1WDIXV/Md8cfVEDSQx7wpbXE5+JqeX/6ChVgArJ+aBG9 8jP+YcOMlnAFFldR65XhYTP31oZfeE31vYjEoW7wbZv7AFp8k8nwq6os416RgLFIIq BeBjPc+yZzpgFqulPHjoaTIeBHFEtiKSVKFHMlRkE6SkBjreqYalZ1j7t9DTsoluGj 75DzBPjGkSP1w== From: "Masami Hiramatsu (Google)" To: Steven Rostedt Cc: Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org Subject: [PATCH v2] tracing: Show the tracer options in boot-time created instance Date: Wed, 19 Nov 2025 09:21:34 +0900 Message-ID: <176351169375.1795430.7653862896005389480.stgit@mhiramat.tok.corp.google.com> X-Mailer: git-send-email 2.52.0.rc1.455.g30608eb744-goog User-Agent: StGit/0.19 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable From: Masami Hiramatsu (Google) Since tracer_init_tracefs_work_func() only updates the tracer options for the global_trace, the instances created by the kernel cmdline do not have those options. Fix to update tracer options for those boot-time created instances to show those options. Fixes: 428add559b69 ("tracing: Have tracer option be instance specific") Signed-off-by: Masami Hiramatsu (Google) --- Change in v2: - Fix update_tracer_options() to update all instances. - Update tracer_options_updated after update all instances. --- kernel/trace/trace.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 8ae95800592d..4a6784057855 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -10231,11 +10231,16 @@ static __init int __update_tracer_options(struct = trace_array *tr) return ret; } =20 -static __init void update_tracer_options(struct trace_array *tr) +static __init void update_tracer_options(void) { + struct trace_array *tr; + guard(mutex)(&trace_types_lock); + + list_for_each_entry(tr, &ftrace_trace_arrays, list) + __update_tracer_options(tr); + tracer_options_updated =3D true; - __update_tracer_options(tr); } =20 /* Must have trace_types_lock held */ @@ -10937,7 +10942,7 @@ static __init void tracer_init_tracefs_work_func(st= ruct work_struct *work) =20 create_trace_instances(NULL); =20 - update_tracer_options(&global_trace); + update_tracer_options(); } =20 static __init int tracer_init_tracefs(void)