[LU-14008] avoid data copy with immediate message sending.

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.15.0
• Severity: 3
• Assignee: Alexey Lyashkov
• Reporter: Alexey Lyashkov

Description

memcpy used in o2ib LND to avoid RDMA transfer for the payload size less than 4k.
But that is not a requirements for CX4 card and likely other.
Lets avoid it.