[LU-2654] ll_imp_inval cpu lockup

• Type: Bug
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.4.0
• Affects Version/s: Lustre 2.4.0
• Labels: LB
• Severity: 3
• Assignee: WC Triage
• Reporter: Oleg Drokin

Description

Just had a cpu lockup in import invalidation thread.

PID: 31247  TASK: ffff880080938300  CPU: 1   COMMAND: "ll_imp_inval"
 #0 [ffff8800456edcf0] schedule at ffffffff814f7c98
 #1 [ffff8800456edcf8] cfs_hash_for_each_relax at ffffffffa0db07af [libcfs]
 #2 [ffff8800456edd88] cfs_hash_for_each_nolock at ffffffffa0db217f [libcfs]
 #3 [ffff8800456eddb8] ldlm_namespace_cleanup at ffffffffa10a8870 [ptlrpc]
 #4 [ffff8800456edde8] osc_import_event at ffffffffa046ce96 [osc]
 #5 [ffff8800456ede78] ptlrpc_invalidate_import at ffffffffa110b93f [ptlrpc]
 #6 [ffff8800456edf28] ptlrpc_invalidate_import_thread at ffffffffa110bfaf [ptlrpc]
 #7 [ffff8800456edf48] kernel_thread at ffffffff8100c14a

Crashdump in /exports/crasdumps/t/imp-lockup.dmp modules in /exports/crashdumps/192.168.10.210-2013-01-18-21:37:33/modules