Date: Tue, 2 Nov 1999 18:28:27 +0100 From: Eivind Eklund <eivind@FreeBSD.ORG> To: Erez Zadok <ezk@cs.columbia.edu> Cc: Mats Lofkvist <mal@algonet.se>, freebsd-fs@FreeBSD.ORG Subject: Re: stupidfs - easily extensible test file systems? Message-ID: <19991102182827.B72085@bitbox.follo.net> In-Reply-To: <199910312211.RAA00014@shekel.mcl.cs.columbia.edu>; from ezk@cs.columbia.edu on Sun, Oct 31, 1999 at 05:11:20PM -0500 References: <y2qk8o35pl4.fsf@kairos.algonet.se> <199910312211.RAA00014@shekel.mcl.cs.columbia.edu>
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On Sun, Oct 31, 1999 at 05:11:20PM -0500, Erez Zadok wrote: > Many people on this list understand the problems and know how to fix them. > There are even some experimental patches made by Eivind Eklund, but those > patches aren't part of the kernel. Eivind's patches used to be in > > http://www.freebsd.org/~eivind/VOP_GETBACKINGOBJECT.patch > > and now they appear to be in > > http://www.freebsd.org/~eivind/FixNULL.patch > > (Eivind, can you confirm the new URL? FixNull.patch seems to include stuff > unrelated to the VFS, such as scsi driver fixes. Thanks.) The URL is correct - those fixes are there because the environment I used for working on those patches were somewhat unusual (cross-compilation from a RELENG_2_2 box), and that brokenness was in the way of me doing FS work, so it is fixed in that tree (though not committed, as I was not sure it was a good idea). > There's also been talk about some people (McKusick et al) rewriting the > whole VFS. While I think that's a great idea, it's a large undertaking and > will take a long while for busy people like McKusick to complete. I think a > complete rewrite, if any, should be scheduled for 5.x. I would therefore > suggest that a simpler fix such as Eivind's be incorporated into a 4.0 so > people can use stackable f/s (unionfs, nulls, and my wrapfs/cryptfs, etc.) > in the more immediate future. My patches doesn't solve the entire problem. If they actually had created a working environment for stacking layers, they would have been in the kernel already. Eivind. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
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