Re: NFS locking bug -- limited mtime resolution means nfs_lock() does not provide coherency guarantee

From: Trond Myklebust (trond.myklebust@fys.uio.no)
Date: Thu Sep 14 2000 - 08:09:35 EST


>>>>> " " == Theodore Y Ts'o <tytso@MIT.EDU> writes:

> There has been some talk of doubling the size of the ext2
> inode, which will of course cause some backwards compatibility
> problems and would mean that you would only be able to use
> certain advanced features on new or converted ext2 filesystems.
> However, there are enough downsides with this that it's
> something of a last resort. It would make life a lot easier
> for those various people doing new ext2 features from muscling
> each other over space all the time.

I'm sure the idea has been raised before, but given the above
paragraph I can't resist poking my nose into where it doesn't really
belong:

Would it perhaps make sense to use one of these last 'free' fields
as a pointer to an 'inode entension'?
If you still want ext2fs to be able to accommodate new projects and
ideas, then it seems that being able to extend the inode is a
desirable feature, but perhaps this overlaps with the apparent plans
for adding resource forks?

Cheers,
  Trond
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