[LU-17125] jbd2 commit deadlock

• Type: Bug
• Resolution: Duplicate
• Priority: Critical
• Severity: 3
• Assignee: WC Triage
• Reporter: Vladimir Saveliev

Description

The following commit deadlock has been observed on a customer side:

Sep  7 16:41:55 lustren002 kernel: jbd2/md65-8     D    0 259595      2 0x80004000
Sep  7 16:41:55 lustren002 kernel: Call Trace:
Sep  7 16:41:55 lustren002 kernel:  __schedule+0x2c4/0x700
Sep  7 16:41:55 lustren002 kernel:  ? __wake_up_common_lock+0x89/0xc0
Sep  7 16:41:55 lustren002 kernel:  schedule+0x38/0xa0
Sep  7 16:41:55 lustren002 kernel:  jbd2_log_wait_commit+0xac/0x120 [jbd2]
Sep  7 16:41:55 lustren002 kernel:  ? finish_wait+0x80/0x80
Sep  7 16:41:55 lustren002 kernel:  ldiskfs_sync_fs+0x1c1/0x1d0 [ldiskfs]
Sep  7 16:41:55 lustren002 kernel:  osd_sync+0xdf/0x180 [osd_ldiskfs]
Sep  7 16:41:55 lustren002 kernel:  qsd_acquire+0x468/0xdd0 [lquota]
Sep  7 16:41:55 lustren002 kernel:  qsd_op_begin0+0x161/0x890 [lquota]
Sep  7 16:41:55 lustren002 kernel:  ? __kmalloc+0x102/0x240
Sep  7 16:41:55 lustren002 kernel:  qsd_reserve_or_free_quota+0x2e1/0x7b0 [lquota]
Sep  7 16:41:55 lustren002 kernel:  osd_reserve_or_free_quota+0xe6/0x1c0 [osd_ldiskfs]
Sep  7 16:41:55 lustren002 kernel:  ? lu_context_init+0xa5/0x1a0 [obdclass]
Sep  7 16:41:55 lustren002 kernel:  tgt_cb_last_committed+0xc2/0x5c0 [ptlrpc]
Sep  7 16:41:55 lustren002 kernel:  osd_trans_commit_cb+0xe6/0x300 [osd_ldiskfs]
Sep  7 16:41:55 lustren002 kernel:  ldiskfs_journal_commit_callback+0xa5/0xe0 [ldiskfs]
Sep  7 16:41:55 lustren002 kernel:  jbd2_journal_commit_transaction+0x17ba/0x19e0 [jbd2]
Sep  7 16:41:55 lustren002 kernel:  kjournald2+0xbd/0x270 [jbd2]

Revert of "LU-14370 quota: use dt_sync() to flush pending writes" could be a potential fix for the problem.

Issue Links

• duplicates: LU-15880 ASSERTION( lqe->u.se.lse_pending_write == 0 )