linux-ext4 - Re: [RFC PATCH v1 00/30] fs: inode->i

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Message-ID: <20170321173704.GA17872@fieldses.org>
Date:   Tue, 21 Mar 2017 13:37:04 -0400
From:   "J. Bruce Fields" <bfields@...ldses.org>
To:     Jeff Layton <jlayton@...hat.com>
Cc:     Christoph Hellwig <hch@...radead.org>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-nfs@...r.kernel.org, linux-ext4@...r.kernel.org,
        linux-btrfs@...r.kernel.org, linux-xfs@...r.kernel.org
Subject: Re: [RFC PATCH v1 00/30] fs: inode->i_version rework and optimization

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.