[LU-11756] kib_conn leak

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.13.0, Lustre 2.12.3
• Labels: patch
• Severity: 3
• Assignee: Andriy Skulysh
• Reporter: Andriy Skulysh

Description

crash>kib_conn_t.ibc_peer,ibc_refcount,ibc_list,ibc_state,ibc_comms_error,ibc_tx_queue_nocred 0xffff8808c0612e00
  ibc_peer = 0xffff880f0e2a2780
  ibc_refcount = {
    counter = 1
  }
  ibc_list = {
    next = 0xdead000000100100, 
    prev = 0xdead000000200200
  }
  ibc_state = 5
  ibc_comms_error = -12
  ibc_tx_queue_nocred = {
    next = 0xffffc900200de3e0, 
    prev = 0xffffc900200de3e0
  }

A tx was queued by a race into ibc_tx_queue_nocred while disconnecting connection. So the connection stays in unused state but it can't be destroyed because it is referenced by the tx.
It results in 

[18891797.073780] Lustre: 1572:0:(niobuf.c:292:ptlrpc_abort_bulk()) Unexpectedly long timeout: desc ffff880a4eaf1c00

Comments

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/36347/
Subject: LU-11756 o2iblnd: kib_conn leak
Project: fs/lustre-release
Branch: b2_12
Current Patch Set:
Commit: bb9644c360f4d54d2a2568f94ba8ae94489a873f

[Gerrit Updater]

Minh Diep ([e-mail]) uploaded a new patch: https://review.whamcloud.com/36347
Subject: LU-11756 o2iblnd: kib_conn leak
Project: fs/lustre-release
Branch: b2_12
Current Patch Set: 1
Commit: d69377151754b5497e332fe3102dc581fd970336

[Peter Jones]

Landed for 2.13

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/33828/
Subject: LU-11756 o2iblnd: kib_conn leak
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: a155c3fca38d2a3092f9b5d116ad7877d51d1db1

[James A Simmons]

Its in master-next so it should be landing soon

[Chris Horn]

I'm hitting this pretty regularly with master

[Gerrit Updater]

Andriy Skulysh ([e-mail]) uploaded a new patch: https://review.whamcloud.com/33828
Subject: LU-11756 o2iblnd: kib_conn leak
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 23da5af6f503bda38e70cbf8d82922676ff9bf0c