From nobody Mon Feb 9 12:15:37 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 500CA25DCFD; Wed, 30 Apr 2025 15:07:04 +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=1746025625; cv=none; b=hEgogf7MlF5L1w3p+0/d7gMNYLtlQm8wQt5nLR2aXtyJHv3rRp+sf8OAznHXARdIm3MznZVAjRX5DkGBVvieUwsZhaTZUaGu4lcpuOyUjb/UnECqRCT5SW1xcZqRR6m9WX0Tf2IXhz5wohv0YrsG1Tk9wVXoFwyIVyOxixQksIU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746025625; c=relaxed/simple; bh=h02vtg+uo9MQLcJqO0oaAc8ETCkA4CEZoiZkSocwMrw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=pXHQEt6pVu8S4ABqyT+FX2mXETbZvKX9k37zm3WDzlqBn4gcBPLwU7CKF7iDsTQDH0U0jbYuglz+5ehrWijy9fzhzQTMJujn25jDouEjMVb0mpPQV0Edx+8RkDuUQxdEgmQe73dwNYaH/JOXi9su6zLWZdk7BvpV8f+rllzCFBQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jGPgPdJx; 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="jGPgPdJx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E924BC4CEF0; Wed, 30 Apr 2025 15:07:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746025624; bh=h02vtg+uo9MQLcJqO0oaAc8ETCkA4CEZoiZkSocwMrw=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=jGPgPdJx6HlGTYWP06HKysNQ/Hx6S9M5qGOui5IiQyzX8JuYB0i0QZ0M1rigxrMvj 3z7Lx6N7/+aLRPQcXTUSyHk15Ow51rz8ajeBMPUSBCExcf6LcnBB6N1Bn9RhMHGDiM tY+n5y7x7CmFRKsUsGLqNckcxqf6eDgGXfNzk+jmTOtkz4xcvqsYEHL3tmIKNvundr OJ3j2hcAWFJ2ZUQxN0CVpiijSo1zO5yJqrsoC1MkNd5Fl4PxThKmh/70k6WfRUW8c+ hsafL4Vqk+EXlrn4pRzlTVJxCYM91R3YeI56mD2VQe13zssMqTAGqWaM2OPhw0HTFO rhHw0yfNcQojQ== From: Jeff Layton Date: Wed, 30 Apr 2025 08:06:48 -0700 Subject: [PATCH v6 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: <20250430-reftrack-dbgfs-v6-2-867c29aff03a@kernel.org> References: <20250430-reftrack-dbgfs-v6-0-867c29aff03a@kernel.org> In-Reply-To: <20250430-reftrack-dbgfs-v6-0-867c29aff03a@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/ZANAwAIAQAOaEEZVoIVAcsmYgBoEjyTZic4mSRdvadMvmskl/R23v/69+pdAJIj8 mP7Ppdt3HGJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaBI8kwAKCRAADmhBGVaC FdiEEACpnvN0dEI1q2tZxnGw8SjA7iZBndKYTOyvozPDnH9qZ5nJms0ukmkEKIc4/ZBjAI+gvbW ZS4eP3JRLOH2cZ2dy+OBMZrnqaogzEN80E6RhJwiARyzUjoBZJi0qkH7Z/uuU2zrK0km9OxUHgq Ferw1BFBjyTWDAj2wswW4oNCc/hhehV+H36x60OnzA9BnYnYbcBIShS6uPiG6wi6iRohQlcf39B jc5G+iOeKSddLmSo2zUwnxhP4T9WEfbZIyHV3dZjS2TxkC9KsA78OuV/19riDeGEjA62Yc/dOAM DcEBdOcZFa/OVh3gQbnSXlNg8C1N8COP5TUCssDVXYbVv5AlTWpjcJVOvYH2uZrCFBiESotZcMZ /anzSL0s6/7r6txzNdQmGDlac24G9x8TeBVRJ7V4NznUo9gQT/9zYCH86FBd5CWWURllA61wKw7 WjHg13Af+lFq3bSN/dLFWeqxUKu6UJdZTagO3UFKQzoznKC/yBP/zfltjqnzucRswWup/LSoImV Fh9wMYLYHsLjoiMMYxN+jWRYXspwFuGJMgkmZw02ZVRlmeVsljECSP8+88LpUUO4frTuO++Jezl gbW1z/CgrWYfiIT41Ez4/rXzNWZ3EJOkFTLG8Ni47qKcydNk9xPc156skr6apUn5x901pNT/Lkf Id7YhaTSJm3HixQ== 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