From owner-cvs-all Fri Jan 30 23:51:32 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id XAA06454 for cvs-all-outgoing; Fri, 30 Jan 1998 23:51:32 -0800 (PST) (envelope-from owner-cvs-all@FreeBSD.ORG) Received: from critter.freebsd.dk (critter.freebsd.dk [195.8.129.14]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id XAA06447 for ; Fri, 30 Jan 1998 23:51:29 -0800 (PST) (envelope-from phk@critter.freebsd.dk) Received: from critter.freebsd.dk (localhost.cybercity.dk [127.0.0.1]) by critter.freebsd.dk (8.8.7/8.8.5) with ESMTP id IAA04461; Sat, 31 Jan 1998 08:47:22 +0100 (CET) To: Ollivier Robert cc: cvs-committers@FreeBSD.ORG Subject: Re: cvs commit: src/sys/conf files options src/sys/i386/conf LINT src/sys/i386/i386 autoconf.c src/sys/kern init_main.c init_sys In-reply-to: Your message of "Sat, 31 Jan 1998 03:06:05 +0100." <19980131030605.34628@keltia.freenix.fr> Date: Sat, 31 Jan 1998 08:47:22 +0100 Message-ID: <4459.886232842@critter.freebsd.dk> From: Poul-Henning Kamp Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk X-To-Unsubscribe: mail to majordomo@FreeBSD.org "unsubscribe cvs-all" In message <19980131030605.34628@keltia.freenix.fr>, Ollivier Robert writes: >According to Jonathan Lemon: >> Well, from what I understand of LFS, it performs best as a 'write-only' >> filesystem. You aren't really supposed to be reading from an LFS, you >> should be reading from your memory cache. From that perspective, I heard >> one professor call a 64MB cache "small" for a LFS system. > >If you read Margo's thesis, the huge memory consumption is the big problem >of Sprite and LFS is supposed to need less memory. > >One of its biggest problem apart from being incompatible with the unified >buffer cache/VM is that many features were never implemented (like the >rollback fsck). > >The thesis is very enlightning on FS and their flaws BTW. And the ensuing exchange of polite insults between outerhout and margo is a worthwhile appendix as well. I still think doing a LFS from scratch is time better spent than reviving this one, but that is only my personal oppinion. -- Poul-Henning Kamp FreeBSD coreteam member phk@FreeBSD.ORG "Real hackers run -current on their laptop." "Drink MONO-tonic, it goes down but it will NEVER come back up!"