From nobody Sun Feb 8 19:40:12 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 C8AAD296151; Mon, 28 Apr 2025 18:27:05 +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=1745864825; cv=none; b=bf7Gpt4zb3x9/VD8AxQvSGMruEyae3OaSq7wur0q5Nl8DTwepp3Q2PHC83zzp3DmHr0CIV2swiQrcXAlyAtZh/4t/prlZ0gO2k1JwGnsxSL5PhdJTRQKQsubT51iQ8ijvCMYfQZerPopo4iMsUilYLXHS0J10Wojs/3cyXpCdi8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745864825; c=relaxed/simple; bh=h02vtg+uo9MQLcJqO0oaAc8ETCkA4CEZoiZkSocwMrw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=fsni17Ql5JMZQIIMFocm7Phe49vAVbLr43IOIVQD1WcgmwB4obqrEHZAtA/gER9OITAkKqBM5Q0n8lG8OLglztJpY1uIcMX87bauXiHcC6AYFDBM9HeiJvsDSkgy8aIlwkeD5wBS3FDDgHALW1wrS7KbB0pgcSHeDl/1RJLYs58= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XNOqf7j3; 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="XNOqf7j3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A5198C4CEF1; Mon, 28 Apr 2025 18:27:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1745864825; bh=h02vtg+uo9MQLcJqO0oaAc8ETCkA4CEZoiZkSocwMrw=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=XNOqf7j3CzjorNwFyIBk2uqgCdY8rUGvRy9by8gmo1bdnUryPIes/eB/0xVweiEjO zjPAUSgO2MgCFm4jzLx1y2N1DEkPg8w5Gwj4wbYYpxS2vanX3QxJVoMVD6UG18Zqhs LtU2i4o38qWQxyUrtQhuPPPVv0UtBWAc6BEcsqiIN4/Z8jGM3NFqMQ43IahuoTV/Iu JRl6y+7PKmjAurU2s32jewHrpt4QXhwfQrvrhtNMs01051UfhARalYiziCaWtUCXCL JTloBGDW7z4yaUV8aO0b5u0OQyGS+4uENjEwFhX8dQ1ooRXKjcRFgqpVdRCaEr4Skx vWtE4spiglHEQ== From: Jeff Layton Date: Mon, 28 Apr 2025 11:26:25 -0700 Subject: [PATCH v5 02/10] ref_tracker: add a top level debugfs directory for ref_tracker 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 Message-Id: <20250428-reftrack-dbgfs-v5-2-1cbbdf2038bd@kernel.org> References: <20250428-reftrack-dbgfs-v5-0-1cbbdf2038bd@kernel.org> In-Reply-To: <20250428-reftrack-dbgfs-v5-0-1cbbdf2038bd@kernel.org> To: Andrew Morton , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin Cc: Kuniyuki Iwashima , Qasim Ijaz , Nathan Chancellor , Andrew Lunn , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, Jeff Layton X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1387; i=jlayton@kernel.org; h=from:subject:message-id; bh=h02vtg+uo9MQLcJqO0oaAc8ETCkA4CEZoiZkSocwMrw=; b=owEBbQKS/ZANAwAIAQAOaEEZVoIVAcsmYgBoD8h1wJh2LTt/ZX/SmXyVMcwsU4+HoiDNlOqaJ X/pWNTCVVWJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaA/IdQAKCRAADmhBGVaC FSFhD/4jXzbUGZpfQ+eJhWzENK/65qLg1kswKEYZesiyEtUwbpTn01weKqHUCnUNF2grcMlm3/H 7xtN4eb9L1VTELG7+ATz56c5C67AkEn3sNNcZDF6+AO5Hm0YR2jamrEGZKdQuRaMSQTFdr1VSf7 O48jNrJ/HLCLCO/wjFuqrGpOFsMtQPm+RfU9wJ2/b2gUeYZ5D2pHd0fxT2p/To7+tluwZGr4DFx B1NrOnAwSqLUvIC5yJLr23c411lKjT5NYjOfWcnlPM1Kgni+P2bfTj5Xc0SKbuSwROy1DR9Ac82 kqJzpVsn+eOXjdZz73uZW5iDY38X+rFEwb0AvmH4sAcSHjn3nUguF5RrJc8POahbowo9T1a022T glmKDjobpW/9sax2ol1yI/xccVWWtMPWK0lV8h8SGXdB4w5zygxd42z4owEArK+D1248PA1jqzx FYti1GnEWAScuQkhHqIvBFeuE51Vn7PMloX0gIKpDL0QO6zCu0ZoFYT+MaTq4OgyyjO6nMtC3i4 Ph+V/dQxxLV1E65UcwQTdXmP3At+5T5+RTP7wZeMfRFfKftJ8fmNv+PZpg557MeTcYg0Vh6+yj8 gqO+AnG5HIZ5xwcFdx46f3ooJ0RsYMPMgCNksjF0FQZ/fS0kdPY8wRdFdAfpANQJIw0i62Q3XdK 8Hv5IfIIWyabKqQ== X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 Add a new "ref_tracker" directory in debugfs. Each individual refcount tracker can register files under there to display info about currently-held references. Reviewed-by: Andrew Lunn Signed-off-by: Jeff Layton --- lib/ref_tracker.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c index de71439e12a3bab6456910986fa611dfbdd97980..a66cde325920780cfe7529ea9d8= 27d0ee943318d 100644 --- a/lib/ref_tracker.c +++ b/lib/ref_tracker.c @@ -12,6 +12,8 @@ #define REF_TRACKER_STACK_ENTRIES 16 #define STACK_BUF_SIZE 1024 =20 +static struct dentry *ref_tracker_debug_dir =3D (struct dentry *)-ENOENT; + struct ref_tracker { struct list_head head; /* anchor into dir->list or dir->quarantine */ bool dead; @@ -273,3 +275,17 @@ int ref_tracker_free(struct ref_tracker_dir *dir, return 0; } EXPORT_SYMBOL_GPL(ref_tracker_free); + +#ifdef CONFIG_DEBUG_FS +#include + +static int __init ref_tracker_debugfs_init(void) +{ + ref_tracker_debug_dir =3D debugfs_create_dir("ref_tracker", NULL); + if (IS_ERR(ref_tracker_debug_dir)) + pr_warn("ref_tracker: unable to create debugfs ref_tracker directory: %p= e\n", + ref_tracker_debug_dir); + return 0; +} +late_initcall(ref_tracker_debugfs_init); +#endif /* CONFIG_DEBUG_FS */ --=20 2.49.0