[LU-12621] o2iblnd QP sizing -EINVAL retries

• Type: Improvement
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.13.0, Lustre 2.12.3
• Assignee: Amir Shehata (Inactive)
• Reporter: Mike Marciniszyn

Description

The logic currently in Lustre that loops reducing the queue sizes is silly.

The ib_query_device() in kiblnd_hdev_get_attr() is done to save off the max_mr_size in the hdev.

The code could save off max_qp_wr and use that cap the send queue calculations to avoid creating a QP above that limit.