From owner-freebsd-stable Wed Jul 3 9: 6:45 2002 Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9F32F37B42F for ; Wed, 3 Jul 2002 09:06:33 -0700 (PDT) Received: from wall.polstra.com (wall-gw.polstra.com [206.213.73.130]) by mx1.FreeBSD.org (Postfix) with ESMTP id DD11443E09 for ; Wed, 3 Jul 2002 09:06:32 -0700 (PDT) (envelope-from jdp@polstra.com) Received: from vashon.polstra.com (vashon.polstra.com [206.213.73.13]) by wall.polstra.com (8.11.3/8.11.3) with ESMTP id g63G6UT52580; Wed, 3 Jul 2002 09:06:30 -0700 (PDT) (envelope-from jdp@vashon.polstra.com) Received: (from jdp@localhost) by vashon.polstra.com (8.12.4/8.12.4/Submit) id g61H1xYi010406; Mon, 1 Jul 2002 10:01:59 -0700 (PDT) Date: Mon, 1 Jul 2002 10:01:59 -0700 (PDT) Message-Id: <200207011701.g61H1xYi010406@vashon.polstra.com> To: stable@freebsd.org From: John Polstra Cc: don@sandvine.com Subject: Re: number mbufs / cluster In-Reply-To: References: Organization: Polstra & Co., Seattle, WA Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG In article , Don Bowman wrote: > > > > holy cow. How much memory does this thing have and what did you do to > > abuse it soo much? :-) I didn't think you could jack those values that > > high and not get panics. > > > > I tried changing MCLSHIFT to 10. Although this would seem like > the right thing to do, some trouble ensues... Some things like nfs > don't seem to work right (just UDP traffic as far as I could see). > (10 would yield a 1K cluster). Are there > any assumptions somewhere that a cluster is >= MTU size? Yes, practically every Ethernet driver assumes that a cluster will hold a full-sized packet. John -- John Polstra John D. Polstra & Co., Inc. Seattle, Washington USA "Disappointment is a good sign of basic intelligence." -- Chögyam Trungpa To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message