From owner-freebsd-net Wed Sep 25 12:48:43 2002 Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2ABC537B401; Wed, 25 Sep 2002 12:48:42 -0700 (PDT) Received: from iguana.icir.org (iguana.icir.org [192.150.187.36]) by mx1.FreeBSD.org (Postfix) with ESMTP id CDA3F43E4A; Wed, 25 Sep 2002 12:48:41 -0700 (PDT) (envelope-from rizzo@iguana.icir.org) Received: from iguana.icir.org (localhost [127.0.0.1]) by iguana.icir.org (8.12.3/8.11.3) with ESMTP id g8PJmAIb050357; Wed, 25 Sep 2002 12:48:10 -0700 (PDT) (envelope-from rizzo@iguana.icir.org) Received: (from rizzo@localhost) by iguana.icir.org (8.12.3/8.12.3/Submit) id g8PJmAPd050356; Wed, 25 Sep 2002 12:48:10 -0700 (PDT) (envelope-from rizzo) Date: Wed, 25 Sep 2002 12:48:10 -0700 From: Luigi Rizzo To: Doug Ambrisko Cc: Prafulla Deuskar , freebsd-net@FreeBSD.ORG Subject: Re: Fwd: mbuf chain Message-ID: <20020925124810.B50200@iguana.icir.org> References: <20020924212719.A42295@iguana.icir.org> <200209251939.g8PJdjr10039@ambrisko.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: <200209251939.g8PJdjr10039@ambrisko.com>; from ambrisko@ambrisko.com on Wed, Sep 25, 2002 at 12:39:45PM -0700 Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Wed, Sep 25, 2002 at 12:39:45PM -0700, Doug Ambrisko wrote: ... > Various drivers have code to deal with this when the structure > it is putting the frags into runs out :-( See a recent bug fix to > the ste(4) gleaned from the fxp(4). This type of problem is probably > lurking in other drivers. Unfortunately the ste(4) driver siliently which suggests that we should definitely try to modify sbappend() and/or possibly sbcompress to reduce the fragment count to reasonably small values even in presence of very small writes. cheers luigi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message