Subject: Re: [RFC][PATCH 5/8] add f_op for checkpointability
From: Dave Hansen <dave@linux.vnet.ibm.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: containers <containers@lists.linux-foundation.org>,
       "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
       Ingo Molnar <mingo@elte.hu>, Alexey Dobriyan <adobriyan@gmail.com>
In-Reply-To: <20090228205329.GB4254@infradead.org>
References: <20090227203425.F3B51176@kernel>
	 <20090227203431.D1E697CB@kernel>  <20090228205329.GB4254@infradead.org>
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Date: Mon, 02 Mar 2009 09:05:56 -0800
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On Sat, 2009-02-28 at 15:53 -0500, Christoph Hellwig wrote:
> Also the double-use of the op seem not very nice to me.  Is there any
> real life use case were you would have the operation on a file but
> sometimes not allow checkpoiting?

I'm still reaching here...

I was thinking of /proc.  Opening your own /proc/$$/* would certainly be
considered OK.  But, doing it for some other process not in your pid
namespace would not be OK and would not be checkpointable.

I know we're not quite in real-life territory here, yet, but I'm still
thinking.

-- Dave

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