From nobody Wed Dec 17 17:29:11 2025 Received: from dysnomia.uberspace.de (dysnomia.uberspace.de [185.26.156.223]) (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 26BEC18A92B for ; Tue, 9 Jul 2024 13:52:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.26.156.223 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720533141; cv=none; b=ahoCtzwtVfne+1qoMa6EfuU+pOKgShfd7dLHMLE0rr/vNW1CWP5bwiy4TyBFwUaF0EXBHk8h1O3Igb0PNzDuYdhuIw/K1gXBBmc8GHPfuewoatokkWU2TsrPf0TcEtIfMuKh8NEWnpl+OE3ZOgGxqVO5mvD9FSHV8zxMFBzCPDs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720533141; c=relaxed/simple; bh=qKJYEZA0smcFgq+FhK5l8Y1wMc+S0BF7hSq8um9dZro=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=XUU1sV1Xl2o4hff8KbnRllM2ONagTOqbOKxcI+RO5jgcrVDjgOnCt+PTerZZyTfRHeMqRr1hL/ecxLmgiQtxuI5XXlTEJZELIjwHjJ75vsTRkG3OiEXMQCBnG7Gapqov+JupoB0Zh1hX9OGgTkAmUWNlTmviQp//WiXo4uiukmI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lublin.se; spf=pass smtp.mailfrom=lublin.se; dkim=fail (0-bit key) header.d=lublin.se header.i=@lublin.se header.b=pRqhuJMD reason="key not found in DNS"; arc=none smtp.client-ip=185.26.156.223 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lublin.se Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lublin.se Authentication-Results: smtp.subspace.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=lublin.se header.i=@lublin.se header.b="pRqhuJMD" Received: (qmail 1058 invoked by uid 989); 9 Jul 2024 13:52:15 -0000 Authentication-Results: dysnomia.uberspace.de; auth=pass (plain) Received: from unknown (HELO unkown) (::1) by dysnomia.uberspace.de (Haraka/3.0.1) with ESMTPSA; id 8E7421C002A; Tue, 09 Jul 2024 15:52:14 +0200 (CEST) From: Daniel Lublin To: Jonathan Corbet Cc: Daniel Lublin , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] Documentation: add reference from dynamic debug to loglevel kernel params Date: Tue, 9 Jul 2024 15:51:57 +0200 Message-ID: <4633bdb82c1c7c014d79840887878624a55c59f8.1720533043.git.daniel@lublin.se> X-Mailer: git-send-email 2.45.2 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 X-Rspamd-Bar: / X-Rspamd-Report: BAYES_HAM(-1.146869) MIME_GOOD(-0.1) MID_CONTAINS_FROM(1) FORGED_SENDER(0.3) R_MISSING_CHARSET(0.5) X-Rspamd-Score: 0.55313 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=lublin.se; s=uberspace; h=from:to:cc:subject:date; bh=qKJYEZA0smcFgq+FhK5l8Y1wMc+S0BF7hSq8um9dZro=; b=pRqhuJMDNktpa9RcjYugQHzAGjLblsecUTBYWZx/4DvzEVBB3dyvFYhbr+98tAWbdafy2gtxu/ sepKGIMSWSq56+a5xCOG1bNI0mExpZqAdhT6Uu49Pd9DrHuwrpI+dr2ixoLHbYOkLcCmd0OKhn+R QGRP+jS8svYsW2fttNh8xSX2HQxZLtZ2LRs4HIqpInQL87kdeAXO92nJ7IbV1T1lk68I2w9nIOCe e8hGwl9V7te8pDZWk7+DM25Unhbok7yr/h7DBkyF4dDmJqB06+Sljb2T2rjSySVWDSAxc8mGJirP 7KDlOzG2QYSxrD3rGc33BKF7eTFWdF6fQiAxsYMjdF5D5OctaOoHv4lA0MDxx3kOAL1CLdgwpP/D 3P+GRvZ13hEYi2bXc5lTLlAM90phhBFAGSBofnPlfmZUccLyd41p29A2kdhBUMma4gwsWt0AZEKc 0LkHo1bOib2cG0wrw5VUO90ejZvKlFLZQPwhCVCW54mYTgU0iwjNNmkdHUEG0+PbE7sswB1Q0X5N 9Tjd3Jz0gLfA0w/upVdHzISxRU+vm1Bm3r2weqJwjFQZu3dgU5mCBRhHE/2YcwjdKE79u+RJCdM7 WnidAdkdujjp7DUI7EAhOygYx6FBV3lqh+3+8Fjknv+mWfN1daVRAX+A6IhrOaYQeIAvL3pk9ok8 g= Content-Type: text/plain; charset="utf-8" This is useful information for somebody who has managed to dig into enabling debug output, but is wondering why there is no such output appearing on the console. Signed-off-by: Daniel Lublin --- Documentation/admin-guide/dynamic-debug-howto.rst | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/admin-guide/dynamic-debug-howto.rst b/Documentat= ion/admin-guide/dynamic-debug-howto.rst index 0e9b48daf690..7c036590cd07 100644 --- a/Documentation/admin-guide/dynamic-debug-howto.rst +++ b/Documentation/admin-guide/dynamic-debug-howto.rst @@ -26,6 +26,11 @@ Dynamic debug provides: - format string - class name (as known/declared by each module) =20 +NOTE: To actually get the debug-print output on the console, you may +need to adjust the kernel ``loglevel=3D``, or use ``ignore_loglevel``. +Read about these kernel parameters in +Documentation/admin-guide/kernel-parameters.rst. + Viewing Dynamic Debug Behaviour =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D =20 --=20 2.45.2