From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from osnlsmtp01-01.prod.phx3.secureserver.net (osnlsmtp01-01.prod.phx3.secureserver.net [50.63.11.50]) (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 3EF712DC323 for ; Fri, 20 Feb 2026 21:50:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=50.63.11.50 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771624204; cv=none; b=LbzPcptqdDYwYNYUJo8C6GCeoH1MAlrYOVTCL4vaZ5MRqp7JCsgUgtJIHyUjvJfALaNZoQBUeRfRkgfL6AbIZBmF4Buc0dkZZ5ACuXjXl0Zfnv1LhzctxckLFLZrTFI2CIQwSENeGwACd2d2snHQKpuy7cwGl5yrKio5f3mlC+w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771624204; c=relaxed/simple; bh=dRiuz8pAh3AiRiDmOaW4zH+hQsS3t/EgMFDKdTLCkZQ=; h=MIME-Version:Date:From:To:Subject:Message-ID:Content-Type; b=QJhcd64+3YzfiMcepsRX0OFxdEC3z8cGCgbxWJeGg5D+r6JXeXYjHmDgXeoxELYkml5jQQAIJ0f5ZRm5HeSJKn7yPdYgO1hz4BUP9WVGwTTnFJfTPTtFs82GvEmhDuUfsrRmWh84qTz4/mO6m441SxMb5cTi9V9dwQiPMbOEkFE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=autodiystuff.com; spf=pass smtp.mailfrom=autodiystuff.com; arc=none smtp.client-ip=50.63.11.50 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=autodiystuff.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=autodiystuff.com Received: from p3plzcpnl505327.prod.phx3.secureserver.net ([107.180.118.250]) by : HOSTING RELAY : with ESMTPS id tYFav99IVCd7itYFavS3bk; Fri, 20 Feb 2026 21:41:26 +0000 X-CMAE-Analysis: v=2.4 cv=e8Osj6p/ c=1 sm=1 tr=0 ts=6998d507 a=G2IjUgO45E0x6ghgta+12g==:117 a=G2IjUgO45E0x6ghgta+12g==:17 a=xqWC_Br6kY4A:10 a=Nx2JMdyiJPIA:10 a=kj9zAlcOel0A:10 a=HzLeVaNsDn8A:10 a=Duki3n1T0_7TFthV-VsA:9 a=CjuIK1q_8ugA:10 a=jfQmcWBtuV-grpLkH97o:22 X-SECURESERVER-ACCT: epao1234 Received: from [::1] (port=39734 helo=p3plzcpnl505327.prod.phx3.secureserver.net) by p3plzcpnl505327.prod.phx3.secureserver.net with esmtpa (Exim 4.99) (envelope-from ) id 1vtYFZ-00000006dnU-0dmT for netfilter-devel@vger.kernel.org; Fri, 20 Feb 2026 14:41:26 -0700 Precedence: bulk X-Mailing-List: netfilter-devel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Fri, 20 Feb 2026 14:41:25 -0700 From: mb8@autodiystuff.com To: netfilter-devel@vger.kernel.org Subject: Netfilter CPU Cycles Message-ID: <28545c101b8fb76bb1382ed2abc46890@autodiystuff.com> X-Sender: mb8@autodiystuff.com Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - p3plzcpnl505327.prod.phx3.secureserver.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - autodiystuff.com X-Get-Message-Sender-Via: p3plzcpnl505327.prod.phx3.secureserver.net: authenticated_id: mb8@autodiystuff.com X-Authenticated-Sender: p3plzcpnl505327.prod.phx3.secureserver.net: mb8@autodiystuff.com X-Source: X-Source-Args: X-Source-Dir: X-ENTITLEMENT-ID: c8bd992a-a81d-11e5-a352-842b2bfb08b1 X-CMAE-Envelope: MS4xfF6t4PMYbJ2mN4axUkHTBC2hXNJMxoXse10vdXODxSA+QS5+7/43N2Fv+qGYSgp8q0PnHPNc/6sDAk3ExIqGtqQaw17CWEuV4dIRUFP1jINgm1j8Qj/3 qNXX+SXs0zPqPGAigD5/Soj4tVdcMj8UFx3IZ2qM5I6qf5x0HrzZCjZBZFVAGuX6dtCCwUVpBYGicE2IGhHdRCB5kWVeYUmKGMI3kjKrOc54Chqixm/jl1lQ yrfSNuEep6AhRqysWx5c/g== When a hook is running (iptables etc) and there are no rules associated with an interface (eth1), does Netfilter in kernel still burn cpu cycles to know there are no rules? Does this behavior change if eth1 is promisc with no ipv4/v6 vs having assigned IP? Thank you, MB8