From nobody Fri Dec 19 15:44:49 2025 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 8C3E2279788; Mon, 14 Apr 2025 14:45:57 +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=1744641957; cv=none; b=GqhmIyaq6Aeyk/ftgQWGgfTlnk6ypaRPzW4CbFnJN/TsCd0cIYApyyR7O7qQkEXj7wLiaFMvJQwtCTszrglIPFCvuGI0GtsmvUO/EQkWY/kynjcMhuMOsvKkDJVDIyqOp+TAJH6SbK/l5XgoVX1Vh4y2vGY8KVc9PZKHsVI/JNY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744641957; c=relaxed/simple; bh=SSajUPnbQSKVzXF6E1uLVagrvTLcwv8/FusW/NRPovQ=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=me0rgAwy6rH4v6tkItJk5J4hybFStMxvZwuUFikBWLFCx2Sx6D6SMZAJNqStSmJrEpQVjtZ6YKBr5jpGx71K4qom1jFDr/ArKjpSugljHKh+Mte/QKTVKCxYzuzlTARaT0py6A1r1NEdCD2l+FJJVozV30N/H/KM/zXE23BHtOo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=GRy9ocqh; 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="GRy9ocqh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E875CC4CEE9; Mon, 14 Apr 2025 14:45:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744641956; bh=SSajUPnbQSKVzXF6E1uLVagrvTLcwv8/FusW/NRPovQ=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=GRy9ocqh4N8HQI21DVIv78Zw1urvsw+0pRLfcePBTeb2plz/oV2iUkT8br3pCFAJz nqty22Xj40WazHZO3TH39/mqXI9RREEZUiYb1a2AmGnQG2z7L+TY2Cb06jkg29Awqz EwmC9S+MUOrALB74saINuju6c9yyePzTbvz9wPBDoYnbNB48UIrammCnIvlSSfnNKp 8vMQh/AlDnEWEiKTLqjHZXbNLQRUHBdpMMTJdz2aA9L/73DZ+1/GLxVMCWlA2Qbklt qncYO2giRTjgC0yztuAfy17X60p8eAcx4wfgWQg27obSMYsboieHTxTt+1miBhYoq1 /e9h97Jw1CRbQ== From: Jeff Layton Date: Mon, 14 Apr 2025 10:45:46 -0400 Subject: [PATCH 1/4] 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: <20250414-reftrack-dbgfs-v1-1-f03585832203@kernel.org> References: <20250414-reftrack-dbgfs-v1-0-f03585832203@kernel.org> In-Reply-To: <20250414-reftrack-dbgfs-v1-0-f03585832203@kernel.org> To: Andrew Morton , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman Cc: Qasim Ijaz , Nathan Chancellor , Andrew Lunn , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Jeff Layton X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1356; i=jlayton@kernel.org; h=from:subject:message-id; bh=SSajUPnbQSKVzXF6E1uLVagrvTLcwv8/FusW/NRPovQ=; b=owEBbQKS/ZANAwAIAQAOaEEZVoIVAcsmYgBn/R+hj2kUX5eXDLiaWqm4WPGSrs9x61tpKod4K XzgMxKqzV+JAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCZ/0foQAKCRAADmhBGVaC FbCDEACQ2POkqnjyopUj3rPvwD1Sk20Xb2xJJV2km9vgHog0f6k6z9/xx2IsTN02nMlrQHFfACZ Q7bVotWODf1jlKfqAyqSXdhD59y6MTZyZpXWWBRpRIbVLgKyKaGNCrK67cKMBc8AR2FSpx/4+Sa ZJMBBKOwzzZtF7RXfxxFnsBC4CPSXQ1eh91h9m7BES3mA5QOR7IgaBex/hz12FizW1BMyYYtC/X L2zcwvk3KwP6NRder4LAtjkzJhhbx9z0U5Iq+y+qBT6N5wtRABZN1H52JQVnzbIbVUa1fNWy2zy 7TwqIe/ixuIfCQ0zMC+XCEIWeXX9T88kVRULYwbUUY8jGcE5fTNOxUIShuClXJW6DG5tSBoo7cj imMK9zg8QeUvBBNGcVfvNCqB8atrDU4cfdRiT/P4t9FvOvJ+VZUuKpIF4IIba2wDuotLiszLpz3 /4jQc4FWMlZpx2vqm5OieMZsH77BgXLag/BLJkpywBFh8LSp4OWdbkvRRGVANZusVBkv+5l2e9X CRITIyybwDK7bUUMuPTHIYuiSBXTdOUgNK9CW5AmT8wfXTb1HAjow4U0C3p6CB7C3uaUIq4Jbqm c99WIewg/NrsV80adSm70IVUmHA0HHm+GpAb2zmDAdov7hvFVD3mIynHH8n+MLElLDpdBdjJwJh 3GLYxLl07LV59Rg== 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. Signed-off-by: Jeff Layton --- lib/ref_tracker.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c index cf5609b1ca79361763abe5a3a98484a3ee591ff2..c96994134fe1ddfcbf644cc75b3= 6b7e94461ec48 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; + struct ref_tracker { struct list_head head; /* anchor into dir->list or dir->quarantine */ bool dead; @@ -273,3 +275,19 @@ 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_debug_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); + ref_tracker_debug_dir =3D NULL; + } + return 0; +} +late_initcall(ref_tracker_debug_init); +#endif /* CONFIG_DEBUG_FS */ --=20 2.49.0