linux-kernel - Re: [PATCH v2 00/12] make rpc_pipefs be mountable multiple time

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Message-ID: <20110105114155.GN19804@ZenIV.linux.org.uk>
Date:	Wed, 5 Jan 2011 11:41:55 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	"Kirill A. Shutemov" <kas@...nvz.org>
Cc:	Trond Myklebust <Trond.Myklebust@...app.com>,
	"J. Bruce Fields" <bfields@...ldses.org>,
	Neil Brown <neilb@...e.de>,
	Pavel Emelyanov <xemul@...allels.com>,
	linux-nfs@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 00/12] make rpc_pipefs be mountable multiple time

On Wed, Dec 29, 2010 at 03:14:18PM +0200, Kirill A. Shutemov wrote:
> Prepare nfs/sunrpc stack to use multiple instances of rpc_pipefs.

Won't that make sunrpc impossible to rmmod once you've got it in?
Note that having a reference to vfsmount pins it down, which pins
the superblock down, which pins the file_system_type down, which
pins the damn module down.  So cleanup_sunrpc() won't be ever called,
AFAICS...
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