> Ok, a few points..
> 
> Your changes make the *initial* XID random. The initial XID is set when
> an RPC connection is set up. The rest of the XIDs is generated by
> decrementing the initial XID.
> 
> If that avoids duplication, it's fine with me, since the additional
> slow code is only used when setting up the connection; it's a one-time
> overhead that you won't really see in a benchmark such as lat_rpc
> or spray(8).
> 
> However, if you mean to randomize *every* XID, this algorithm is
> way too expensive.

	i changed the __RPC_GETXID(), which seems to be for initialization,
	that's all.  none of other code is touched.

	it seems to me that the library is INCREMENTING rm_xid, rather than
	decrementing.  am I right?

itojun