From owner-freebsd-hackers Sat May 22 10:42: 5 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from uni4nn.gn.iaf.nl (osmium.gn.iaf.nl [193.67.144.12]) by hub.freebsd.org (Postfix) with ESMTP id 502C114F3B for ; Sat, 22 May 1999 10:41:23 -0700 (PDT) (envelope-from wilko@yedi.iaf.nl) Received: from yedi.iaf.nl (uucp@localhost) by uni4nn.gn.iaf.nl (8.9.2/8.9.2) with UUCP id TAA18395; Sat, 22 May 1999 19:21:19 +0200 (MET DST) Received: (from wilko@localhost) by yedi.iaf.nl (8.9.3/8.9.3) id QAA09140; Sat, 22 May 1999 16:12:39 +0200 (CEST) (envelope-from wilko) From: Wilko Bulte Message-Id: <199905221412.QAA09140@yedi.iaf.nl> Subject: Re: Source code of SGI XFS In-Reply-To: <199905211616.JAA00959@dingo.cdrom.com> from Mike Smith at "May 21, 1999 9:16:34 am" To: mike@smith.net.au (Mike Smith) Date: Sat, 22 May 1999 16:12:39 +0200 (CEST) Cc: newton@internode.com.au, pasha@sim.net.ua, freebsd-hackers@FreeBSD.ORG X-Organisation: Private FreeBSD site - Arnhem, The Netherlands X-pgp-info: PGP public key at 'finger wilko@freefall.freebsd.org' X-Mailer: ELM [version 2.4ME+ PL43 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG As Mike Smith wrote ... > > Pavel Narozhniy wrote: > > > > > Does anybody heard about SGI releasing XFS source code? > > > > Yup, they're doing it. > > > > I would guess that FreeBSD would need a fairly thorough revamp of its > > handling of kernel memory allocation before XFS would be fully usable, > > though: XFS buffer management is pretty full-on. > > Read "Irix has shitty block I/O support so XFS has to do it all itself". > > > The filesystem maintains its own pool of kernel buffers separate from > > the VM page cache which it uses for aggregating I/O transfers (so that > > if, say, you make 5 separate out-of-order I/Os which just happen to > > blanket a contiguous region of a disk object, XFS will collapse them > > into a single I/O; > > We do this too; it's called I/O clustering, but it's done below the > filesystem so that anyone and everyone can benefit from it. The most interesting thing of XFS is it's GRIO I'd say. | / o / / _ Arnhem, The Netherlands - Powered by FreeBSD - |/|/ / / /( (_) Bulte WWW : http://www.tcja.nl http://www.freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message