From nobody Wed Dec 08 18:01:23 2021 X-Original-To: freebsd-net@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id D88AE18DE7BD for ; Wed, 8 Dec 2021 18:01:38 +0000 (UTC) (envelope-from lutz@iks-jena.de) Received: from annwfn.iks-jena.de (annwfn.iks-jena.de [IPv6:2001:4bd8::19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4J8Q36449hz4t82; Wed, 8 Dec 2021 18:01:38 +0000 (UTC) (envelope-from lutz@iks-jena.de) X-SMTP-Sender: IPv6:2001:4bd8:0:666:248:54ff:fe12:ee3f Received: from belenus.iks-jena.de (belenus.iks-jena.de [IPv6:2001:4bd8:0:666:248:54ff:fe12:ee3f]) by annwfn.iks-jena.de (8.15.2/8.15.2) with ESMTPS id 1B8I1NKY032337 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Wed, 8 Dec 2021 19:01:23 +0100 X-MSA-Host: belenus.iks-jena.de Received: (from lutz@localhost) by belenus.iks-jena.de (8.14.3/8.14.1/Submit) id 1B8I1NDi007287; Wed, 8 Dec 2021 19:01:23 +0100 Date: Wed, 8 Dec 2021 19:01:23 +0100 From: Lutz Donnerhacke To: Lev Serebryakov Cc: Neel Chauhan , freebsd-net@FreeBSD.org Subject: Re: Porting OpenBSD MPLS to FreeBSD Message-ID: <20211208180123.GA7158@belenus.iks-jena.de> References: <7de5f4bf0fdec027b5ae5d844a7cb0f5@FreeBSD.org> <20211119201637.GA3334@belenus.iks-jena.de> <20211207142853.GB367@belenus.iks-jena.de> <5461c58c-bae8-8ee5-86f6-25c9de5030fe@FreeBSD.org> List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5461c58c-bae8-8ee5-86f6-25c9de5030fe@FreeBSD.org> X-message-flag: Please send plain text messages only. Thank you. User-Agent: Mutt/1.5.17 (2007-11-01) X-Rspamd-Queue-Id: 4J8Q36449hz4t82 X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; none X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[] X-Spam: Yes X-ThisMailContainsUnwantedMimeParts: N On Wed, Dec 08, 2021 at 11:08:38AM +0300, Lev Serebryakov wrote: > On 07.12.2021 17:28, Lutz Donnerhacke wrote: >> I do use netgraph for carrier-grade stuff. >> Yes, ng_bridge was limited, but this is fixed. > Doesn't it take separate lock for each packet passed though hook? I'm sure, it was true some time ago... It's a read lock for each packet on each, which can be shared by CPUs. I'm not aware that there are a major perfomace penalty, so I'd assume the lock is lightweight.