From nobody Wed Feb 11 05:41:00 2026 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 754CE2367D9 for ; Mon, 9 Feb 2026 02:20:06 +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=1770603606; cv=none; b=cvq+7MZVSVbBDb1EgjHN2SfGzYR7C5mS28sfgV4PspdaWn+p4f3wFPYtbqIsmSmtBmuua3w3gAAD4BhGVdAp57c76Gn/ncPQD1b9Wn59AGPrlLV4ioSM8IP3M+B9N4B99KTVKrMXMQVN4wc4zaqlQHrCYhBx0ZKCfjF9ihEfVVI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770603606; c=relaxed/simple; bh=0wK/CVCCdN7PgklUZddDM9+V5/kap6yrYmHmD4HpuN4=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=VFNly4VUYBee5IOyEke5Du8HhxUo9mN2JsXHgtoWlQ1uqmE7xalrm1B8lZtyqSKWwIcFsu97q2ceaLlf2X8YA+0nVj00AB6tdtVRI79s7sO1h1HDgzdfcjf1sjcLh7flNbPy4mvgwSnVacOFBGHHHJ/rA7/cdcTjX78XiMUPhew= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Qn4nm4ld; 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="Qn4nm4ld" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5355AC19425; Mon, 9 Feb 2026 02:20:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770603606; bh=0wK/CVCCdN7PgklUZddDM9+V5/kap6yrYmHmD4HpuN4=; h=Date:From:To:Cc:Subject:References:From; b=Qn4nm4ldmAtd6Dh7L25IUguz6WE1ABoZurj7NuTbi5h5XcAZuGK5XRUBFnMLjX0Pf Et3/M21s9+s/PR8hRTWZ6C1+O3CZ/wh3HPkDGsJGpon0yMhsgypQ97oqjH7Lx0FZwL 6OSVttMHM/HiqT+kv10EyeM2nELITgAcVtRgRbnnpUBRMVO3y05ThYw0dGP0z8S9Dp jRGQKX0KpSOu+/Elk6vpjX49AoF1VXq7ZzZJHCGKgA8np2rXiv23wpDeX2u6/HWCJq ZsWG2xC/IDR+9LJEri8JZJl+xktLmm6+PIVPGCtsjrzIbp55iJJ+Ob4YhiTCsmopOz jTCoRxUaOK8vA== Received: from rostedt by gandalf with local (Exim 4.99.1) (envelope-from ) id 1vpGtQ-0000000Aa1t-3Yjo; Sun, 08 Feb 2026 21:20:52 -0500 Message-ID: <20260209022052.701967355@kernel.org> User-Agent: quilt/0.68 Date: Sun, 08 Feb 2026 21:20:30 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , Yaxiong Tian Subject: [for-next][PATCH 04/20] tracing/kprobes: Skip setup_boot_kprobe_events() when no cmdline event References: <20260209022026.627895421@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Yaxiong Tian When the 'kprobe_event=3D' kernel command-line parameter is not provided, there is no need to execute setup_boot_kprobe_events(). This change optimizes the initialization function init_kprobe_trace() by skipping unnecessary work and effectively prevents potential blocking that could arise from contention on the event_mutex lock in subsequent operations. Link: https://patch.msgid.link/20260204015401.163748-1-tianyaxiong@kylinos.= cn Acked-by: Masami Hiramatsu (Google) Signed-off-by: Yaxiong Tian Signed-off-by: Steven Rostedt (Google) --- kernel/trace/trace_kprobe.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index 9953506370a5..89d2740f7bb5 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -2048,6 +2048,10 @@ static __init int init_kprobe_trace(void) trace_create_file("kprobe_profile", TRACE_MODE_READ, NULL, NULL, &kprobe_profile_ops); =20 + /* If no 'kprobe_event=3D' cmd is provided, return directly. */ + if (kprobe_boot_events_buf[0] =3D=3D '\0') + return 0; + setup_boot_kprobe_events(); =20 return 0; --=20 2.51.0