From: "J. Bruce Fields" <bfields@fieldses.org>
Subject: Re: [RFC PATCH v1 00/30] fs: inode->i_version rework and optimization
Date: Tue, 21 Mar 2017 13:37:04 -0400
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Cc: Christoph Hellwig <hch@infradead.org>,
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To: Jeff Layton <jlayton@redhat.com>
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On Tue, Mar 21, 2017 at 01:23:24PM -0400, Jeff Layton wrote:
> On Tue, 2017-03-21 at 12:30 -0400, J. Bruce Fields wrote:
> > 	- NFS doesn't actually require that it increases, but I think it
> > 	  should.  I assume 64 bits means we don't need a discussion of
> > 	  wraparound.
> 
> I thought NFS spec required that you be able to recognize old change
> attributes so that they can be discarded. I could be wrong here though.
> I'd have to go back and look through the spec to be sure.

https://tools.ietf.org/html/rfc7862#section-10

--b.