On Tue, Jan 27, 2009 at 5:10 AM, Evgeniy Polyakov [off-list ref] wrote:

On Mon, Jan 26, 2009 at 06:17:40PM -0800, Andy Grover (andy.grover@oracle.com) wrote:

quoted

+/*
+ * Yes, a global lock.  It's used so infrequently that it's worth keeping it
+ * global to simplify the locking.  It's only used in the following
+ * circumstances:
+ *
+ *  - on connection buildup to associate a conn with its maps

Is this a rare condition? Is this protocol only intended for the
long-living connections and is not suitable for the cases when lots of
them are created and teared down quickly?

Connections are long-lived. Imagine a cluster. RDS multiplexes all
sockets' datagrams between 2 hosts over a single transport-layer
connection, so if a node sends ONE datagram to another, an IB
connection is set up and sticks around indefinitely.

Regards -- Andy