[LU-12424] LNet MR routing: possible loop when discovery is off

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Fix Version/s: Lustre 2.13.0, Lustre 2.12.6
• Affects Version/s: Lustre 2.12.8
• Severity: 3
• Assignee: Amir Shehata (Inactive)
• Reporter: Amir Shehata (Inactive)

Description

Found by hornc. When discovery is off, LNetPrimaryNID() can enter into a loop discovering a peer with no LNet module loaded.

Issue Links

• is related to: LU-10931 failed peer discovery still taking too long
• is related to: LU-12442 recovery-small test_136: mounts stuck in lnet_discover_peer_locked()