[LU-8734] gnilnd handle dla_credits exhaustion

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.10.0
• Severity: 3
• Assignee: Chris Horn
• Reporter: Chris Horn

Description

A few changes to handle dla credits exhaustion

Add delay_list so that when dla_credits are exhausted
we retry sends regardless of whether there is a CQ event
targetted at the connection that tried to send.

Remove retry limit and rely on connection timeouts to
tell us when to close a connection.

Change max_retransmits such that it is the number of
attempts before the connection enters the delay queue.