[LU-1355] LBUG in lovsub_lock_delete_one -- Impossible state: 2 (CLS_ENQUEUED)

• Type: Technical task
• Resolution: Duplicate
• Priority: Major
• Affects Version/s: Lustre 2.1.1
• Environment: https://github.com/chaos/lustre
• Assignee: Jinshan Xiong (Inactive)
• Reporter: Prakash Surya (Inactive)

Description

Hit the following LBUG:

2012-04-29 07:43:52 LustreError: 83833:0:(lovsub_lock.c:381:lovsub_lock_delete_one()) lock@ffff8802615024d8[4 2 0 0 0 00000005] P(0):[0, 18446744073709551615]@[0x16b9ac4cbe:0xc:0x0] {
2012-04-29 07:43:52 LustreError: 83833:0:(lovsub_lock.c:381:lovsub_lock_delete_one())     vvp@ffff88025946e9e8: 
2012-04-29 07:43:52 LustreError: 83833:0:(lovsub_lock.c:381:lovsub_lock_delete_one())     lov@ffff880431e80cf8: 2
2012-04-29 07:43:52 LustreError: 83833:0:(lovsub_lock.c:381:lovsub_lock_delete_one())     0 0: ---
2012-04-29 07:43:52 LustreError: 83833:0:(lovsub_lock.c:381:lovsub_lock_delete_one())     1 1: lock@ffff8803c465faf8[1 3 0 1 1 00000000] R(1):[0, 18446744073709551615]@[0x100a80000:0x1b3b212:0x0] {
2012-04-29 07:43:52 LustreError: 83833:0:(lovsub_lock.c:381:lovsub_lock_delete_one())     lovsub@ffff8801f6d645a0: [1 ffff880431e80cf8 P(0):[0, 18446744073709551615]@[0x16b9ac4cbe:0xc:0x0]] 
2012-04-29 07:43:52 LustreError: 83833:0:(lovsub_lock.c:381:lovsub_lock_delete_one())     osc@ffff8803c4694b50: ffff88010cd766c0 00101001 0xe12a56a3ad7ca7fa 3 ffff880428397e48 size: 0 mtime: 1335700029 atime: 1335700029 ctime: 1335700029 blocks: 0
2012-04-29 07:43:52 LustreError: 83833:0:(lovsub_lock.c:381:lovsub_lock_delete_one()) } lock@ffff8803c465faf8
2012-04-29 07:43:52 LustreError: 83833:0:(lovsub_lock.c:381:lovsub_lock_delete_one()) 
2012-04-29 07:43:52 LustreError: 83833:0:(lovsub_lock.c:381:lovsub_lock_delete_one()) } lock@ffff8802615024d8
2012-04-29 07:43:52 LustreError: 83833:0:(lovsub_lock.c:381:lovsub_lock_delete_one()) Delete CLS_HELD lock
2012-04-29 07:43:52 LustreError: 83833:0:(lovsub_lock.c:383:lovsub_lock_delete_one()) Impossible state: 2
2012-04-29 07:43:52 LustreError: 83833:0:(lovsub_lock.c:384:lovsub_lock_delete_one()) LBUG