linux-kernel - Re: Credentials test patch

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Date:	Tue, 18 Sep 2007 19:24:45 +0100
From:	David Howells <dhowells@...hat.com>
To:	Trond Myklebust <trond.myklebust@....uio.no>
Cc:	dhowells@...hat.com, casey@...aufler-ca.com, viro@....linux.org.uk,
	hch@...radead.org, linux-kernel@...r.kernel.org
Subject: Re: Credentials test patch

Trond Myklebust <trond.myklebust@....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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