[sheepdog] [PATCH] sheep: add simple_store driver again

[MORITA Kazutaka]

At Fri, 24 Aug 2012 16:13:51 +0800,
Liu Yuan wrote:
> 
> On 08/24/2012 04:08 PM, MORITA Kazutaka wrote:
> > I think both farm and plain don't need it.  Can you explain a scenario
> > where it can cause a problem?
> 
> Qemu can issue multiple requests on the same oid, doesn't it? If there

Yes, but I think it is not a problem.

> is some kind of write barrier to prevent reading stale oid or actually
> no problems at all, I'd love to remove this flock, it obfuscate the code
> a lot.

It is okay to read the older data if the vm doesn't receive the ack of
the write requests yet.

Thanks,

Kazutaka