From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Sun, 17 May 2015 10:45:34 +0800

On Sat, May 16, 2015 at 05:08:19PM -0400, David Miller wrote:

quoted

As far as I can tell, this ought to be fine as-is.

OK what about dropping the global rover altogether? Let's just
start randomly like UDP.

---8<---
Currently we use a global rover to select a port ID that is unique.
This used to work consistently when it was protected with a global
lock.  However as we're now lockless, the global rover can exhibit
pathological behaviour should multiple threads all stomp on it at
the same time.

Granted this will eventually resolve itself but the process is
suboptimal.

This patch replaces the global rover with a pseudorandom starting
point to avoid this issue.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Yep, this is fine, applied.

Thanks!