linux-kernel - Re: [RFC PATCH 1/2] Union Mount: glibc readdir support

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Message-ID: <482058C4.8010104@davidnewall.com>
Date:	Tue, 06 May 2008 22:40:28 +0930
From:	David Newall <davidn@...idnewall.com>
To:	bharata@...ux.vnet.ibm.com
CC:	Ulrich Drepper <drepper@...hat.com>, bsn.0007@...il.com,
	libc-alpha@...rceware.org, Jan Blunck <jblunck@...e.de>,
	Erez Zadok <ezk@...sunysb.edu>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, viro@...iv.linux.org.uk,
	Christoph Hellwig <hch@....de>, Mingming Cao <cmm@...ibm.com>,
	Dave Hansen <haveblue@...ibm.com>,
	Trond Myklebust <trond.myklebust@....uio.no>,
	David Woodhouse <dwmw2@...radead.org>
Subject: Re: [RFC PATCH 1/2] Union Mount: glibc readdir support

Bharata B Rao wrote:
> Is dis-allowing NFS-exporting of unions an option ?

Is it that simple?  What about a union further in an NFS export?  What
about union-mounting after the tree has been NFS-exported?  If the
kernel won't fully merge unions then FS servers have to do whatever it
is that's being proposed for glibc.
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