From owner-freebsd-hackers Thu Feb 27 8:20:53 2003 Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 035F037B401 for ; Thu, 27 Feb 2003 08:20:52 -0800 (PST) Received: from murdoch.servitor.co.uk (murdoch.servitor.co.uk [217.151.99.80]) by mx1.FreeBSD.org (Postfix) with ESMTP id B52CC43F85 for ; Thu, 27 Feb 2003 08:20:50 -0800 (PST) (envelope-from paul@iconoplex.co.uk) Received: from mmu-firewall.mmu.ac.uk ([149.170.101.200] helo=miter96pq2w1fz) by murdoch.servitor.co.uk with smtp (Exim 3.33 #3) id 18oQm9-000FfV-00; Thu, 27 Feb 2003 16:20:50 +0000 From: "Paul Robinson" To: , Subject: RE: Disk scheduling in FreeBSD Date: Thu, 27 Feb 2003 16:20:45 -0000 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) In-Reply-To: <1046361700.3e5e3664bcf24@webmail.unixdaemons.com> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Importance: Normal Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Hiten Pandya wrote: > Hello gang. > > Does anyone know what kind of `Disk Scheduling' algorithm, > if any, is used in FreeBSD? I'm assuming you've read this recently then: http://www.kerneltrap.org/node-592.html Anticipatory Schedulers are all well and good, but I think (I might be corrected here) that most of the disk I/O work in FreeBSD has been around softupdates. However, when I read it, and looked at a description of the AS algo (not the source, I don't want to have any GPL infection around me), I have to admit, I did eye up /usr/src and my week's holiday the week after next, just as a bit of fun... Anybody else got plans on this? I need to have a proper look around the source tree, but I think this would be both self-contained (i.e. easy to back out if it breaks) and useful. Quite a small-ish project really as well. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message