Date: Tue, 06 Feb 2001 09:03:51 +0100
From: Poul-Henning Kamp <phk@critter.freebsd.dk>
To: Terry Lambert <tlambert@primenet.com>
Cc: dillon@earth.backplane.com (Matt Dillon), gibbs@scsiguy.com (Justin T. Gibbs), bright@wintelcom.net (Alfred Perlstein), rjesup@wgate.com (Randell Jesup), mjacob@feral.com (Matthew Jacob), msmith@FreeBSD.ORG (Mike Smith), des@ofug.org (Dag-Erling Smorgrav), dnelson@emsphone.com (Dan Nelson), tanimura@r.dl.itc.u-tokyo.ac.jp (Seigo Tanimura), arch@FreeBSD.ORG
Subject: Re: Bumping up {MAX,DFLT}*PHYS (was Re: Bumping up {MAX,DFL}*SIZ in i386)
Message-ID: <31836.981446631@critter>
In-Reply-To: Your message of "Tue, 06 Feb 2001 06:57:48 GMT." <200102060657.XAA12458@usr08.primenet.com>
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In message <200102060657.XAA12458@usr08.primenet.com>, Terry Lambert writes: >> I think the idea Poul originally articulated -- having simple information >> like recommended I/O size, recommended cluster size, and/or maximum I/O >> size, is the correct solution. Getting fancy might buy us a percent >> or two... it isn't worth the effort. > >I thought Poul had discarded that idea as unworkable, after having >tried to make it work; I got the impression that he still liked >the idea, but that he didn't have a way to make it practical (Poul, >please correct me if I am misinterpreting your last post). No, that is perfectly possible and basically on requires the addition of a preferred modulus to the current data in dev_t / struct disk. Optimal individual clustering is unworkable. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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