From owner-freebsd-net Wed Dec 16 06:27:13 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id GAA19745 for freebsd-net-outgoing; Wed, 16 Dec 1998 06:27:13 -0800 (PST) (envelope-from owner-freebsd-net@FreeBSD.ORG) Received: from server.noc.demon.net (server.noc.demon.net [193.195.224.4]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id GAA19726; Wed, 16 Dec 1998 06:26:57 -0800 (PST) (envelope-from fanf@demon.net) Received: by server.noc.demon.net; id OAA02221; Wed, 16 Dec 1998 14:26:48 GMT Received: from fanf.noc.demon.net(195.11.55.83) by inside.noc.demon.net via smap (3.2) id xma002206; Wed, 16 Dec 98 14:26:35 GMT Received: from fanf by fanf.noc.demon.net with local (Exim 1.73 #2) id 0zqHzA-0000Le-00; Wed, 16 Dec 1998 14:31:32 +0000 To: robinson@netrinsics.com, fenner@parc.xerox.com, freebsd-net@FreeBSD.ORG, freebsd-stable@FreeBSD.ORG From: Tony Finch Subject: Re: MLEN < write length < MINCLSIZE "bug" Newsgroups: chiark.mail.freebsd.net In-Reply-To: Organization: Deliberate Obfuscation To Amuse Tony References: <199812151555.PAA07456@netrinsics.com> Message-Id: Date: Wed, 16 Dec 1998 14:31:32 +0000 Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Bill Fenner wrote: >In message <199812151555.PAA07456@netrinsics.com> you write: >> >>Is there any documentation on why MINCLSIZE is currently set to the value it >>is? > >Not that I know of, but I can't say for sure that there's not something >in the 4.4 daemon book. Having read this bit of the red demon book recently (although I can't find the precise reference again at the moment), ISTR that the heuristic is that since allocating an mbuf with a cluster takes two allocations, MINCLSIZE is just bigger than two mbufs. Tony. -- f.a.n.finch**waster dot@dotat.at fanf@demon.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message