Date: Tue, 11 Dec 2001 11:16:05 +0200 From: Maxim Sobolev <sobomax@FreeBSD.org> To: Terry Lambert <tlambert2@mindspring.com> Cc: Greg Lehey <grog@FreeBSD.org>, Hiten Pandya <hitmaster2k@yahoo.com>, current@FreeBSD.org, hackers@FreeBSD.org Subject: Re: [SUGGESTION] - JFS for FreeBSD Message-ID: <3C15CED5.20D65BFE@FreeBSD.org> References: <20011210220153.50612.qmail@web21102.mail.yahoo.com> <3C15AB82.FDF598A8@mindspring.com> <20011211182856.A67986@monorchid.lemis.com> <3C15C9B4.C74F914@mindspring.com>
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Terry Lambert wrote: > > Greg Lehey wrote: > > Since then, it has become possible for the loader to load modules > > before booting the kernel. This means that, theoretically, it would > > be possible to have a JFS root file system. Given the strong > > opposition to the GPL in some factions of the FreeBSD project, I don't > > see this happening any time soon, especially since we still don't know > > if it will buy us anything. > > ? > > OK, I load the kernel from the JFS. I mount the root FS, which > is a JFS. I read the module "jfs.ko" from the JFS so that I can > mount the root FS, which is a JFS, so I can read the module "jfs.ko" > from the JFS so that I can mount the root FS, which is a JFS, so I > can read the module "jfs.ko" from the JFS so that I can mount the > root FS, which is a JFS, so I can... > > Do you see the problem yet? Libstand (and hence the loader) could be extended to allow reading files from jfs without using any GPL'ed code. For example our loader can load modules from the FAT even though we do not have any M$ code. :) Alternatively, /boot could be placed on separate filesystem, which could be ufs or anything else supported by the loader. -Maxim > > >> It is used on IBM MainFrames and Enterprise servers > > >> for high performance and maximum throughput... > > > > > > No, it's not. The Linux JFS is derived from the OS/2 JFS code, not > > > the good AIX JFS code. > > > > That's correct, but note that AIX is moving to this code base too, so > > it's not as if it's second-rate. From what I've seen of the > > structures, JFS2 is *much* better than JFS1. I haven't compared > > performance. > > None of the Web Connections RS/6000 machines ran this OS/2 derived > code. I was under the impression that it was there for Linux > compatability. My impression is, layout or not, the original JFS > is much better code, overall. > > -- Terry > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-current" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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