[sheepdog] [PATCH, RFC] sheep: rewrite blocked notifications

[Christoph Hellwig]

On Wed, May 16, 2012 at 10:14:13PM +0800, Liu Yuan wrote:
> The whole idea looks decent to me. Code block() and unblock() explicitly
> makes the whole path much more readable.
> 
> Yunkai, would you please help review the zookeeper part modification
> Need your ack about it.

Thanks.  I'd be very grateful for a quick review and merging as I have
a queue of patches on top of this one.