[LU-19075] reduce memory usage for the o2iblnd recv path

• Type: Improvement
• Resolution: Unresolved
• Priority: Major
• Severity: 3
• Assignee: Alexey Lyashkov
• Reporter: Alexey Lyashkov

Description

ib_post_recv don't needs a hold ib_recv_wr / ib_sge for while, just in submit time.
lets use stack variable instead of allocated memory.