"Alton, Matthew" wrote:
>
> I am currently conducting a thorough study of the VFS subsystem
> in preparation for an all-out effort to port SGI's XFS filesystem to
> FreeBSD 4.x at such time as SGI gives up the code. Matt Dillon
> has written in hackers- that the VFS subsystem is presently not
> well understood by any of the active kernel code contributers and
> that it will be rewritten later this year. This is obviously of great
> concern to me in this port. I greatly appreciate all assistance in
> answering the following questions:
>
> 1) What are the perceived problems with the current VFS?
> 2) What options are available to us as remedies?
> 3) To what extent will existing FS code require revision in order
> to be useful after the rewrite?
> 4) Will Chapters 6,7,8 & 9 of "The Design and Implementation of
> the 4.4BSD Operating System" still pertain after the rewrite?
> 5) How important are questions 3 & 4 in the design of the new
> VFS?
>
> I believe that the VFS is conceptually sound and that the existing
> semantics should be strictly retained in the new code. Any new
> functionality should be added in the form of entirely new kernel
> routines and system calls, or possibly by such means as
> converting the existing routines to the vararg format &etc.
>
> Does anyone know when SGI will release XFS?
I don't know, but I came across this at SGI:
http://oss.sgi.com/projects/xfs/
It looks as though they plan to release it under the GPL. :(
Chris
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