From nobody Mon Feb 9 04:03:54 2026 Received: from mail-qk1-f196.google.com (mail-qk1-f196.google.com [209.85.222.196]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C08C71DE8BF for ; Sun, 18 Jan 2026 01:18:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.222.196 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768699106; cv=none; b=FvYViOrEiifnftlMQrZsPzJmTG9pVM5uPx/JgpapNvfzaWnG8qH1wFzcjGl5o1FtB8ViJqUgbxgzTHPAzYnrgv+MhsqVnqBYYslTvWXPBbRaa2rI14syrRLUWTv6eGSz613yS/6dEPmP6YPm4gkg78/Mf9HMrDJ1Qehj1vvWe9s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768699106; c=relaxed/simple; bh=dfSf90CX2fFuCBXs9FEXQJWwoweCuaJmCw5t3YHWiD4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GxK8oAaa9HKSja8gu/PtxtEDEUYPaRNwPzOEgAghOSa8Kz83mDlQPq6gceCQKz86rObWRv4rwLyZfTYxaR6M+TKnx1548A2afbRBWrTXSlUB4MeRvnsxzYXq022WxjL6PH3o1LbWo+tOeAaMTDzTQoUCA0NnO3euIhY0jleTdEs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=h2a/e9nS; arc=none smtp.client-ip=209.85.222.196 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="h2a/e9nS" Received: by mail-qk1-f196.google.com with SMTP id af79cd13be357-8c6a001e3bfso198719885a.1 for ; Sat, 17 Jan 2026 17:18:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1768699104; x=1769303904; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=r25epDAJMQ/dj4/lD+Zndgkln/iNdOm3o/jXssTljSE=; b=h2a/e9nSut3T9bIWO0kthXjxhHwLDoDsmipbNksu8DHVIoxaPmx9oofgNhIjBqenQl dN+zDz603mq1S5dRHk8TMWrQ58Yymi9I5Qg8XpYN8DQhJCGc+4P9J5Sbt4CxAZnnKmEe PALtArlPAxHrQl0EUIwpENv82N3XHuxSvHzwTq5oohi45dVQuzG5Ssd1MQGru4i/MNUH /xMYDjglX8ayPeTRkQQbw19LvdrfYAPcS23LTrgCIoyjxJEXOaYljMyhm/tFBk1aLTky lPw/raTGziaDUJuoP7aaxzrGXlXrabwPCTcKO71qMMPY2Q09+RrmxFkP6J4V3AYfuc7G 4AFg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768699104; x=1769303904; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=r25epDAJMQ/dj4/lD+Zndgkln/iNdOm3o/jXssTljSE=; b=O2TInlB1WToOLGHu5jlxNdQ9olIIfpO2+QhoCHQcg85bEZ7sPtrF1RZuyAhXfeYSoQ kk5GVDGTiZulldPKRIDzYtePnLzty0V1cs597OfERCQIVmcr5fb10UBGAwNn8+XhUaxt Y9pTdiNLL4cUKoBK3upsy0Tyq8Hl673JDOM8HKi7m65IcRSteXOumbtXGHiIsu0tngWr +Gax1UCz3zkZu7WWPlYO3CwAbsoi+xDisgk2AyuVN0FCoxOIJfX299GFpgOoBpMgdcDJ TtqggBdQ79MeAuATffP9Be22bW5K/rE1RBquuzF+cGsRgr6AT+ckdUdIUOl3It36BRvw QZwQ== X-Forwarded-Encrypted: i=1; AJvYcCUgwPZ50rvgcT5qUV6oGvx0q+nt6i36eRHoJ2rkH78No5DdMcsqNLAGO5NHyVfKPk4zHgCeaLvlz2kvnaU=@vger.kernel.org X-Gm-Message-State: AOJu0Yx3a9Y03HJTKN+0Z/6qasJSFs5UcyPwc8Zbzd5AInaBJORgUi/+ JCS+1OA2um39guIR04xOAn2CvaFk5TqI/6A18mQ+670dDrvWWxfoO4mh X-Gm-Gg: AY/fxX4+k0bTCHR6ItQayVio9slVMOoubjZCKd+YiVERGdrdd2le76KxwpDp/qQNKET I0L+AaJOdKMQnvu3HypVvEMu82HKjPcrn8gdwk0wVeblGvXJhGzjJJjg/7lo+NzfzKnJDknWXn7 U02VIb2mI59+AAFVQy8qga7XqKZQo5W4HuFxDhdleVYQhF1K73GZ2IsRrihsiR7u7pT9RrQhne9 sne8upt6YaephNayfQyv1q0zZhgegqNXHHj6Oqq38wXdUG1edTptrr25mwiDOVq8+ksZ96Aivtv CtVVDC4vMINPRvrjAipC/iL7gsoK00zNiQE+drZ1t/OSUSMDOiW/aUuiZqoca9z7mnPR4NGLew0 q/Z4NuaKVQG+7LHHzYolKUP90pF1dJQUEINZhAg3GfxnFMXtljPvFEEyfs55zmH3Y+gHPNg3yve ob6sHa0vChsCW9AA9j5qXij8kao00givU8zrfShXmFvhg5G9hjaFDVsL2d6hviVedp8Sbb/sA= X-Received: by 2002:a05:620a:7082:b0:8c5:3881:da8e with SMTP id af79cd13be357-8c6a67b0933mr1054464285a.65.1768699103670; Sat, 17 Jan 2026 17:18:23 -0800 (PST) Received: from pc.tail882856.ts.net ([2600:4041:4491:2000:8a64:ec6b:4:f1]) by smtp.gmail.com with ESMTPSA id af79cd13be357-8c6a72642fdsm512290285a.46.2026.01.17.17.18.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 17 Jan 2026 17:18:22 -0800 (PST) From: "Seokwoo Chung (Ryan)" To: rostedt@goodmis.org, mhiramat@kernel.org, corbet@lwn.net, shuah@kernel.org Cc: mathieu.desnoyers@efficios.com, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, "Seokwoo Chung (Ryan)" Subject: [PATCH v5 v5 1/3] docs: tracing/fprobe: Document list filters and :entry/:exit Date: Sat, 17 Jan 2026 20:18:13 -0500 Message-ID: <20260118011815.56516-2-seokwoo.chung130@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260118011815.56516-1-seokwoo.chung130@gmail.com> References: <20260118011815.56516-1-seokwoo.chung130@gmail.com> 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" Update fprobe event documentation to describe comma-separated symbol lists, exclusions, and explicit suffixes. Signed-off-by: Seokwoo Chung (Ryan) --- Documentation/trace/fprobetrace.rst | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) diff --git a/Documentation/trace/fprobetrace.rst b/Documentation/trace/fpro= betrace.rst index b4c2ca3d02c1..bbcfd57f0005 100644 --- a/Documentation/trace/fprobetrace.rst +++ b/Documentation/trace/fprobetrace.rst @@ -25,14 +25,18 @@ Synopsis of fprobe-events ------------------------- :: =20 - f[:[GRP1/][EVENT1]] SYM [FETCHARGS] : Probe on fun= ction entry - f[MAXACTIVE][:[GRP1/][EVENT1]] SYM%return [FETCHARGS] : Probe on fun= ction exit + f[:[GRP1/][EVENT1]] SYM[%return] [FETCHARGS] : Single function + f[:[GRP1/][EVENT1]] SYM[,[!]SYM[,...]][:entry|:exit] [FETCHARGS] :Multip= le + function t[:[GRP2/][EVENT2]] TRACEPOINT [FETCHARGS] : Probe on tra= cepoint =20 GRP1 : Group name for fprobe. If omitted, use "fprobes" for it. GRP2 : Group name for tprobe. If omitted, use "tracepoints" for= it. EVENT1 : Event name for fprobe. If omitted, the event name is - "SYM__entry" or "SYM__exit". + - For a single literal symbol, the event name is + "SYM__entry" or "SYM__exit". + - For a *list or any wildcard*, an explicit [GRP1/][EVENT1] is + required; otherwise the parser rejects it. EVENT2 : Event name for tprobe. If omitted, the event name is the same as "TRACEPOINT", but if the "TRACEPOINT" starts with a digit character, "_TRACEPOINT" is used. @@ -40,6 +44,13 @@ Synopsis of fprobe-events can be probed simultaneously, or 0 for the default value as defined in Documentation/trace/fprobe.rst =20 + SYM : Function name or comma-separated list of symbols. + - SYM prefixed with "!" are exclusions. + - ":entry" suffix means it probes entry of given symbols + (default) + - ":exit" suffix means it probes exit of given symbols. + - "%return" suffix means it probes exit of SYM (single + symbol). FETCHARGS : Arguments. Each probe can have up to 128 args. ARG : Fetch "ARG" function argument using BTF (only for functi= on entry or tracepoint.) (\*1) --=20 2.43.0