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From: David Howells <dhowells@redhat.com>
In-Reply-To: <1190138621.6656.39.camel@heimdal.trondhjem.org>
References: <1190138621.6656.39.camel@heimdal.trondhjem.org> <336243.38765.qm@web36610.mail.mud.yahoo.com>
To: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: dhowells@redhat.com, casey@schaufler-ca.com, viro@ftp.linux.org.uk,
       hch@infradead.org, linux-kernel@vger.kernel.org
Subject: Re: Credentials test patch
Date: Tue, 18 Sep 2007 19:24:45 +0100
Message-ID: <6388.1190139885@redhat.com>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 868
Lines: 21

Trond Myklebust <trond.myklebust@fys.uio.no> wrote:

> > What I don't really understand is what value is gained by this exercise.
> > Are the savings sufficiently significant to justify the effort?
> 
> It is not about savings, but about new functionality. Basically, the
> existence of reference-counted credentials will allow AFS and NFS to
> cache that information and use it for deferred writes etc.

And also make it easier for cachefiles and hopefully NFSd to override the
active security.

There's a comment somewhere in, I think, the SunRPC code in the Linux kernel
bemoaning the lack of this very feature:-)

David
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