From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794364126; b=ZwFu0MPvUpdVeMnR6NtcCwNHoD2d417+Txky7ImHJDSyQ6+4SSWzxJDzEZV4Ied5jCyM TIjoLerJVzJ4yyoog8kR32+t7x+JHokhr07Tp+VgOibBvTpAEUasKJcm/m0yNpTASZ6JR l75oHPmNLiQCC/mdaZj2FERoQLuHhxHTJ6y3JIApfV4K828dADV7GglwA8XPZXqVOXgKA qSTN0UJHfLQr0tvmypyT5jw9BANeKPrTdBHcoagumOdA7mks0zkOH8K3zWNcbon21+7m+ HE4Ai3//HqEsjBdEInZlsqdMvIFoXlKY4GJ1dAxBzvsJG3+0tmcHC2R9ISNMjzbF4Fw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794364126; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To:Cc: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=g6Xjzp2KEC/KsY4ldRVTU1kARx9U0BwdSrSZ4yHnd30=; b=cUvud7fYhyTwrlXIcLaZLNnoWXscCkONBY6Yorl6lpbleBx4QK2c8FI8WK2lo6MdSMQV AinUP+CRa2J4uQdXOWcqQWFmkd1XM3n388ccmsNK1aDKEHVyrBb5GdGiDlmWvxXZhS397 optrq4RAQGviFOkfZepEZJSzsu3YCunDCEslBlBw7rhQrcJSuQHGRY+dGQ52cZou7lh2l nDSF9NpBrf9kFwfOgOzr7dzVSHObgn/qS9/a53hB0hQtOGkeYg2hSWsszrSkk5CxxXXC6 7DO3xKAus4ORTL0SnNUMUitre6l9BIkb0yi4cwbVnS4dqVSGmnElp4hw1BL+kD6p+5A== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=Ci9Fw38w; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D3C6B60A2625 for ; Wed, 11 Nov 2026 02:28:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=Ci9Fw38w Received: by smtp.kernel.org (Postfix) with ESMTPSA id 50F181F00A03; Wed, 11 Nov 2026 02:28:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794364126; bh=g6Xjzp2KEC/KsY4ldRVTU1kARx9U0BwdSrSZ4yHnd30=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=Ci9Fw38w8qXtOZC/LX+YZDnYumhZhWnDZKq2K/P/OSKA6ZFNAcNmqbYK9EtlpOUbe gCc/yxBELQLY74KzUPuO3vwG4jxX+MgwJSo6nFW5WS2eKmfoffkLXgtYmz3QaQJlJ3 CP9Z4D46OLr912JHLTonvDpimrZYGeBtYxnNmHQOcfICJyUFZ30Ry77p08utZ3mXEu 54CHrwlTrltF98zT0iBEbLFDSO+9qYb8SFLfoUULYShxKYKL12qlJKjE+0b4drCcoH EZMbqKHpGU/71CJQnHAuYY5NdmCoUc4e5LRpfOvkcaiLWLwKA5iwz2C7LVlzNrPB+M AMiKLpCnTfOIw== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH v2] perf parse-events: Don't report unreadable tracepoint globs as unknown Reply-To: sashiko-reviews@lists.linux.dev To: "Hang Zhengyang" Cc: linux-perf-users@vger.kernel.org In-Reply-To: <20261111-tp-glob-errno-v2-1-ca45efb07d31@gmail.com> References: <20261111-tp-glob-errno-v2-1-ca45efb07d31@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Wed, 11 Nov 2026 02:28:45 +0000 X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > From: Hang Zhengyang >=20 > As a normal user, a tracepoint glob gets the wrong error: >=20 > $ perf stat -e 'syscalls:*' true > event syntax error: 'syscalls:*' > \___ unknown tracepoint >=20 > Error: File /sys/kernel/tracing//events/syscalls/* not found. > Hint: Perhaps this kernel misses some CONFIG_ setting to enable this = feature?. >=20 > add_tracepoint_multi_sys() returns ENOENT when nothing matched and > drops the error from reading the directories. Return that error > instead, so the glob reports what a plain tracepoint name does: >=20 > $ perf stat -e 'syscalls:*' true > event syntax error: 'syscalls:*' > \___ can't access trace events >=20 > Error: No permissions to read /sys/kernel/tracing//events/syscalls/* > Hint: Try 'sudo mount -o remount,mode=3D755 /sys/kernel/tracing/' >=20 > Fixes: d002aab87de8 ("perf tp_pmu: Factor existing tracepoint logic to ne= w file") > Assisted-by: Claude:claude-opus-5-5 > Signed-off-by: Hang Zhengyang Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261111-tp-glob-er= rno-v2-1-ca45efb07d31@gmail.com?part=3D1