Date: Sun, 28 Nov 1999 22:29:34 +0100 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: Andrzej Bialecki <abial@webgiro.com> Cc: cvs-committers@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/sys/conf options src/sys/dev/md md.c src/sys/i386/conf GENERIC LINT PCCARD src/sys/kern vfs_conf.c src/sys/sys conf.h src/sys/ufs/mfs mfs_vfsops.c Message-ID: <18050.943824574@critter.freebsd.dk> In-Reply-To: Your message of "Sun, 28 Nov 1999 22:27:01 %2B0100." <Pine.BSF.4.05.9911282222380.82278-100000@freja.webgiro.com>
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In message <Pine.BSF.4.05.9911282222380.82278-100000@freja.webgiro.com>, Andrze j Bialecki writes: >Yes, I understood that part. Don't take it as grumbling, please. I'm just >asking for more info on MD vs. MFS, which you didn't provide. It >seems that they implement almost the same functionality. What are the >gains, then? MFS is a gross hack (Kirks words when in polite company). One of these hacks is hacking up a rootvp. We *really* want to have a rootvp, ie a vnode for the root device, but for a compiled in or preloaded image MFS doesn't have a vnode for "the thing it mounts". Md is a true memory-disk, which has a dev_t for the device and therefore a valid vnode can be synthesized. more features and doc for the md driver will be forthcoming. (Wishes for features are also welcome!) -- Poul-Henning Kamp FreeBSD coreteam member phk@FreeBSD.ORG "Real hackers run -current on their laptop." FreeBSD -- It will take a long time before progress goes too far! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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