[LU-3200] layout lock rpc must not take rpc_lock

• Type: Bug
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.5.0
• Affects Version/s: Lustre 2.5.0
• Labels: patch
• Severity: 3
• Assignee: Jinshan Xiong (Inactive)
• Reporter: CEA

Description

When a client issue an RPC to get a layout lock, it must not hold rpc_lock because in case of a restore the rpc can be blocking for a long time