[LU-9425] Turn RDMA Fragment Fix on by default

• Type: Improvement
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.10.0
• Affects Version/s: Lustre 2.10.0
• Labels: lnet
• Assignee: Doug Oucharek (Inactive)
• Reporter: Doug Oucharek (Inactive)

Description

Now that fix for LU-5718 has landed, there is a question as to whether that fix should be "off" by default requiring a module parameter to activate it.  This ticket is a place to "debate" one way or the other and to change the default to "on" if that is what we want.

I seem to remember a concern about the doubling of SGEs using memory causing problems for LNet routers which may be memory-lean.

Thoughts?