[LU-17115] Lock deadlock between qmt_delete_qid and qmt_dqacq0

• Status: Resolved
• Project: Lustre
• Fix Version/s: Lustre 2.16.0
• Type: Bug
• Priority: Minor
• Reporter: Hongchao Zhang
• Assignee: Hongchao Zhang
• Resolution: Fixed
• Severity: 3

Description

kernel: Call Trace:
kernel: [<0>] jbd2_log_wait_commit+0xc5/0x150 [jbd2]
kernel: [<0>] jbd2_journal_stop+0x353/0x3e0 [jbd2]
kernel: [<0>] __ldiskfs_journal_stop+0x3c/0xb0 [ldiskfs]
kernel: [<0>] osd_trans_stop+0x1c8/0x670 [osd_ldiskfs]
kernel: [<0>] qmt_delete_qid+0x13d/0xa57 [lquota]
kernel: [<0>] qmt_quotactl+0x2b4/0x5f0 [lquota]
kernel: [<0>] mdt_quotactl+0x676/0x7c0 [mdt]
kernel: [<0>] tgt_request_handle+0x856/0x1740 [ptlrpc]
kernel: [<0>] ptlrpc_server_handle_request+0x253/0xbe0 [ptlrpc]
kernel: [<0>] ptlrpc_main+0xc09/0x1c30 [ptlrpc]
kernel: [<0>] kthread+0xd1/0xe0
kernel: [<0>] ret_from_fork_nospec_begin+0x7/0x21

kernel: [<0>] wait_transaction_locked+0x85/0xd0 [jbd2]
kernel: [<0>] add_transaction_credits+0x278/0x310 [jbd2]
kernel: [<0>] start_this_handle+0x1a1/0x430 [jbd2]
kernel: [<0>] jbd2__journal_start+0x103/0x200 [jbd2]
kernel: [<0>] __ldiskfs_journal_start_sb+0x6d/0xe0 [ldiskfs]
kernel: [<0>] osd_trans_start+0x1e7/0x570 [osd_ldiskfs]
kernel: [<0>] qmt_trans_start_with_slv+0x25e/0x540 [lquota]
kernel: [<0>] qmt_dqacq0+0x169/0x1030 [lquota]
kernel: [<0>] qmt_dqacq+0x5b9/0x8c0 [lquota]
kernel: [<0>] mdt_quota_dqacq+0x62/0x160 [mdt]
kernel: [<0>] tgt_request_handle+0x856/0x1740 [ptlrpc]
kernel: [<0>] ptlrpc_server_handle_request+0x253/0xbe0 [ptlrpc]
kernel: [<0>] ptlrpc_main+0xc09/0x1c30 [ptlrpc]
kernel: [<0>] kthread+0xd1/0xe0

Comments

[Gerrit Updater]

"Hongchao Zhang <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/52371
Subject: LU-17115 quota: fix race of acquiring locks in qmt
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 23cb30a4dab493a554ec86eb0a9dcf13eb4efc13

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/52371/
Subject: LU-17115 quota: fix race of acquiring locks in qmt
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: ee0e9447e7022e2caa8b161657d505e17ccdc4a1

[Peter Jones]

Landed for 2.16