From owner-freebsd-hackers@FreeBSD.ORG Fri Oct 12 06:37:19 2007 Return-Path: Delivered-To: hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 375E616A418; Fri, 12 Oct 2007 06:37:19 +0000 (UTC) (envelope-from alexander@leidinger.net) Received: from redbull.bpaserver.net (redbullneu.bpaserver.net [213.198.78.217]) by mx1.freebsd.org (Postfix) with ESMTP id E02C113C455; Fri, 12 Oct 2007 06:37:18 +0000 (UTC) (envelope-from alexander@leidinger.net) Received: from outgoing.leidinger.net (p54A55A9A.dip.t-dialin.net [84.165.90.154]) by redbull.bpaserver.net (Postfix) with ESMTP id F32D42E06A; Fri, 12 Oct 2007 08:19:33 +0200 (CEST) Received: from webmail.leidinger.net (webmail.Leidinger.net [192.168.1.102]) by outgoing.leidinger.net (Postfix) with ESMTP id 64BF55B4800; Fri, 12 Oct 2007 08:18:36 +0200 (CEST) Received: (from www@localhost) by webmail.leidinger.net (8.14.1/8.13.8/Submit) id l9C6IZ3R055981; Fri, 12 Oct 2007 08:18:35 +0200 (CEST) (envelope-from Alexander@Leidinger.net) Received: from pslux.cec.eu.int (pslux.cec.eu.int [158.169.9.14]) by webmail.leidinger.net (Horde MIME library) with HTTP; Fri, 12 Oct 2007 08:18:35 +0200 Message-ID: <20071012081835.dtrpaz2c0880oow4@webmail.leidinger.net> X-Priority: 3 (Normal) Date: Fri, 12 Oct 2007 08:18:35 +0200 From: Alexander Leidinger To: Fabio Checconi References: <20071011022001.GC13480@gandalf.sssup.it> <20071011080734.GA20897@stud.ntnu.no> <20071011114828.GE18725@gandalf.sssup.it> In-Reply-To: <20071011114828.GE18725@gandalf.sssup.it> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; DelSp="Yes"; format="flowed" Content-Disposition: inline Content-Transfer-Encoding: quoted-printable User-Agent: Internet Messaging Program (IMP) H3 (4.1.4) / FreeBSD-7.0 X-BPAnet-MailScanner-Information: Please contact the ISP for more information X-BPAnet-MailScanner: Found to be clean X-BPAnet-MailScanner-SpamCheck: not spam, SpamAssassin (not cached, score=-13.504, required 8, BAYES_00 -15.00, MIME_QP_LONG_LINE 1.40, RDNS_DYNAMIC 0.10) X-BPAnet-MailScanner-From: alexander@leidinger.net X-Spam-Status: No X-Mailman-Approved-At: Fri, 12 Oct 2007 11:57:01 +0000 Cc: hackers@freebsd.org, Ulf Lilleengen Subject: Re: Pluggable Disk Scheduler Project X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Oct 2007 06:37:19 -0000 Quoting Fabio Checconi (from Thu, 11 Oct 2007 =20 13:48:28 +0200): >> From: Ulf Lilleengen >> Date: Thu, Oct 11, 2007 10:07:34AM +0200 >> >> On tor, okt 11, 2007 at 04:20:01 +0200, Fabio Checconi wrote: >> > o What can be an interface for disk schedulers? >> I think the interface developed in [1] is a pretty good one =20 >> actually. I think >> the disksort-routines looked as a good place to do this. Even there it mi= ght >> not know enough about the hardware. >> >> > o How to deal with devices that handle multiple request per time? >> This is an example of the problems you get doing this in GEOM. You =20 >> don't have >> very good knowledge of the hardware. One can't pass this info from the lower layers up into GEOM (maybe by =20 adding some attribute querying interface in GEOM if it doesn't exist)? Bye, Alexander. --=20 The naked truth of it is, I have no shirt. =09=09-- William Shakespeare, "Love's Labour's Lost" http://www.Leidinger.net Alexander @ Leidinger.net: PGP ID =3D B0063FE7 http://www.FreeBSD.org netchild @ FreeBSD.org : PGP ID =3D 72077137