From mboxrd@z Thu Jan 1 00:00:00 1970 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 7373C26B942; Mon, 5 May 2025 17:33:33 +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=1746466413; cv=none; b=Qqem8A4cN2+AEeoL1C61y36ux4OegjJYMkrBeATv9isFmAvYUkpSPhL6spDl5e6jfTNd/1m3ORd4ctWdNoqIr0emvlje+08YaVoOZx23sFo0qvvgehVlSU+kYn5WbUYd4w+UbKTpBYQWPiNg5SeWeqaKiDalh57tYrALTPzaqPo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746466413; c=relaxed/simple; bh=h02vtg+uo9MQLcJqO0oaAc8ETCkA4CEZoiZkSocwMrw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=il1c4bI0Tgtkeb7aBPiQwHEzh9DjLN5SbGkAhxYDe8f2lrz4Q3jzTh50d1QIHe5Y8sOH4ZSaoXXQIaCiOWgrp+BCGlJ6SECRmjG/rYCTkjJhx2FnLSbes56zIeDO+HlYRRHirB3i+nrGZcRbcJd6RIFOUcd7qLjJ3wG7DrrF7rE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=F4aDHFdn; 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="F4aDHFdn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8D892C4CEF8; Mon, 5 May 2025 17:33:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746466413; bh=h02vtg+uo9MQLcJqO0oaAc8ETCkA4CEZoiZkSocwMrw=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=F4aDHFdnNcLca9gYOHfd9fOmbe/zPFx1H4HEGYfT8AtoutRC+2e9fPF5Oy2m68lEg Cs+7qCDb0KeKfGp8b7l9YmXPQxlZDIs9kafuYjdCnsBFu1jjXc41LPFsbANwHXF65Q L+VccfGmGKjzqadV/eew2SXIEGL0Zo+hEnASiiIzLZvCMH59w7g/V4c8zZ3hkRL8yY TO79EJcWuMKlQiu0JzXiNseffSqrBngCdSITebXy9aVbnzCfCx8MzhzUkdFd6KnaJB AX8nxOnOtzjv7T8LaFVIz4gjjbi8+NaaskRFLqWZ2o2hqESq5ImLsUtH56UPQfotz4 SgBZwwIaTAILw== From: Jeff Layton Date: Mon, 05 May 2025 13:33:16 -0400 Subject: [PATCH v7 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: 7bit Message-Id: <20250505-reftrack-dbgfs-v7-2-f78c5d97bcca@kernel.org> References: <20250505-reftrack-dbgfs-v7-0-f78c5d97bcca@kernel.org> In-Reply-To: <20250505-reftrack-dbgfs-v7-0-f78c5d97bcca@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/ZANAwAIAQAOaEEZVoIVAcsmYgBoGPZlhSQZ/mtt0iZdXA5OKFjNHwjCuyEL3zyt1 RCjvhUpZxeJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaBj2ZQAKCRAADmhBGVaC FeP5EADFj06mm8aeYDTcUwtRPTKeSCnURsq7GNBniSrIFvK0n5zZsKEFPa/16/zLM8gloV0hknv gJkgTJITSMmzf3tFhQI2rQX6C37CVL0NM7JK5Yu3iz0rJT4KQRCF7jwkctJVFM0bPevfvryhq4l WBFt5bO21jTpaeV88Ke6GmYsU8JV1t7PUT1EQv9V65tKxY9Y4IopC7RGuGR6e01xYPKmlw25xdS kAERPz0HIlMGou6Rmg5zuv0eKbQ/1P86WIYLzYoeNHWMyt9e/ktQWA/WSV8MQUleoCkwtRQ+RXe sb/krxnqU1e3rbs6pE91aw8vjc8HB1+791MOzwgDtP/smWCL2cChLK5DgUl2/30PfVT3ik2kp2t NstaF9mG4YdEX7HJ6iOYtCGgkzXfbPBI1lXMfjyjt4MqzSOR1zMwXHpphUxQUtLJQaJl3opLKHS 8YN1Hj4OBUL1X458kRzkXATaJZoE0mFLiEDFfU1rfTJLanyMbuicf0YHzy2H7ZR9zFNB6RkUI5k WBGovtNm7zGDYp+K2JMQ9STFO6zK5FBrKPTY0nDnV4ZpbnG2DH8aqMdiSbLIy36034Pa/+b34Zn eMfyzbFUt3Ai1seTue9jR6W7phXBkJ2OI/E2/1Z5I9U6o69EAfiyX6Dztyf5rmyMzB6RUFVVtCv lawmhm2QoEZGKkg== 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..a66cde325920780cfe7529ea9d827d0ee943318d 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 +static struct dentry *ref_tracker_debug_dir = (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 = debugfs_create_dir("ref_tracker", NULL); + if (IS_ERR(ref_tracker_debug_dir)) + pr_warn("ref_tracker: unable to create debugfs ref_tracker directory: %pe\n", + ref_tracker_debug_dir); + return 0; +} +late_initcall(ref_tracker_debugfs_init); +#endif /* CONFIG_DEBUG_FS */ -- 2.49.0