linux-kernel - Re: recent nfs change causes autofs regression

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Date:	Tue, 04 Sep 2007 08:51:13 +0100
From:	David Howells <dhowells@...hat.com>
To:	Trond Myklebust <trond.myklebust@....uio.no>
Cc:	dhowells@...hat.com,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jakob Oestergaard <jakob@...hought.net>,
	Frank van Maarseveen <frankvm@...nkvm.com>,
	Hua Zhong <hzhong@...il.com>,
	"'Linux Kernel Mailing List'" <linux-kernel@...r.kernel.org>,
	akpm@...ux-foundation.org
Subject: Re: recent nfs change causes autofs regression

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

>         - the NFSv4 delegation model breaks: the client will be using
>         OPEN when it could use cached opens. More importantly, when
>         performing an operation that requires it to return the
>         delegation on the aliased file, it won't know until the server
>         sends it a callback.

Perhaps sharing could be the default on NFSv4 and non-sharing for 2 & 3?
After all, NFSv4 is supposed to be able to handle local caching on disk.

David
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