From owner-freebsd-net@FreeBSD.ORG Wed Jan 29 22:26:34 2014 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id DD2E2A3E; Wed, 29 Jan 2014 22:26:34 +0000 (UTC) Received: from khavrinen.csail.mit.edu (khavrinen.csail.mit.edu [IPv6:2001:470:8b2d:1e1c:21b:21ff:feb8:d7b0]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id A94701D23; Wed, 29 Jan 2014 22:26:34 +0000 (UTC) Received: from khavrinen.csail.mit.edu (localhost [127.0.0.1]) by khavrinen.csail.mit.edu (8.14.7/8.14.7) with ESMTP id s0TMQXeC049098 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL CN=khavrinen.csail.mit.edu issuer=Client+20CA); Wed, 29 Jan 2014 17:26:33 -0500 (EST) (envelope-from wollman@khavrinen.csail.mit.edu) Received: (from wollman@localhost) by khavrinen.csail.mit.edu (8.14.7/8.14.7/Submit) id s0TMQXxo049095; Wed, 29 Jan 2014 17:26:33 -0500 (EST) (envelope-from wollman) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <21225.32793.237629.329516@khavrinen.csail.mit.edu> Date: Wed, 29 Jan 2014 17:26:33 -0500 From: Garrett Wollman To: Adrian Chadd Subject: Re: Big physically contiguous mbuf clusters In-Reply-To: References: <21225.20047.947384.390241@khavrinen.csail.mit.edu> X-Mailer: VM 7.17 under 21.4 (patch 22) "Instant Classic" XEmacs Lucid X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3 (khavrinen.csail.mit.edu [127.0.0.1]); Wed, 29 Jan 2014 17:26:33 -0500 (EST) Cc: FreeBSD Net X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 29 Jan 2014 22:26:34 -0000 < said: > For servers with lots of memory we could then keep these around and > only dip into them for temporary allocations (eg not VM pages that may > be held for some unknown amount of time.) mbufs may also be held for some unknown amout of time, so I don't think that helps at all. -GAWollman