[sheepdog] [PATCH] sheep: cache sha1 digest for read-only objects

[Liu Yuan]

On 05/14/2013 03:22 PM, MORITA Kazutaka wrote:
>  We
> cannot cache sha1 digests of stale objects blindly because they may be
> hard-linked to the writable objects in the working directory.

Why? We use reanme(2) to stale objects, isn't it atomic operation?

Thanks,
Yuan