Date: Sat, 22 May 1999 16:12:39 +0200 (CEST) From: Wilko Bulte <wilko@yedi.iaf.nl> To: mike@smith.net.au (Mike Smith) Cc: newton@internode.com.au, pasha@sim.net.ua, freebsd-hackers@FreeBSD.ORG Subject: Re: Source code of SGI XFS Message-ID: <199905221412.QAA09140@yedi.iaf.nl> In-Reply-To: <199905211616.JAA00959@dingo.cdrom.com> from Mike Smith at "May 21, 1999 9:16:34 am"
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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
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