[LU-15535] deadlock on lli->lli_lsm_sem

• Type: Bug
• Resolution: Unresolved
• Priority: Critical
• Severity: 3
• Assignee: Lai Siyao
• Reporter: Andriy Skulysh

Description

<struct rw_semaphore 0xffff91737c998370> counter: 102 owner: ffff9174359adf00

PID: 233888  TASK: ffff9174748a5f00  CPU: 23  COMMAND: "mv"
 #1 [ffffbba8a4b0f588] schedule at ffffffff9594a448
 #2 [ffffbba8a4b0f598] rwsem_down_write_slowpath at ffffffff9513c57a
 #3 [ffffbba8a4b0f640] ll_update_default_lsm_md at ffffffffc1339fe3 [lustre]
 #4 [ffffbba8a4b0f678] ll_update_lsm_md at ffffffffc1340439 [lustre]
 #5 [ffffbba8a4b0f6e0] ll_update_inode at ffffffffc1344766 [lustre]
 #6 [ffffbba8a4b0f718] ll_iget at ffffffffc1357a47 [lustre]
 #7 [ffffbba8a4b0f738] ll_prep_inode at ffffffffc1346d5a [lustre]
 #8 [ffffbba8a4b0f800] ll_lookup_it_finish.constprop.28 at ffffffffc1358611 [lustre]
 #9 [ffffbba8a4b0f8e8] ll_lookup_it at ffffffffc1359cb9 [lustre]
#10 [ffffbba8a4b0fb58] ll_lookup_nd at ffffffffc135ca8c [lustre]
#11 [ffffbba8a4b0fbe0] __lookup_slow at ffffffff95325667

PID: 242859  TASK: ffff9174359adf00  CPU: 23  COMMAND: "rm"
 #2 [ffffbba88ba1f7f8] schedule_timeout at ffffffff9594dad3
 #3 [ffffbba88ba1f890] ldlm_completion_ast at ffffffffc10409bc [ptlrpc]
 #4 [ffffbba88ba1f920] ldlm_cli_enqueue_fini at ffffffffc103fa9d [ptlrpc]
 #5 [ffffbba88ba1f990] ldlm_cli_enqueue at ffffffffc10433ed [ptlrpc]
 #6 [ffffbba88ba1fa38] mdc_enqueue_base at ffffffffc119d24d [mdc]
 #7 [ffffbba88ba1fb30] mdc_intent_lock at ffffffffc119f1b9 [mdc]
 #8 [ffffbba88ba1fbd8] mdc_read_page at ffffffffc118c42c [mdc]
 #9 [ffffbba88ba1fcb8] lmv_read_page at ffffffffc12e22d0 [lmv]
#10 [ffffbba88ba1fd00] ll_get_dir_page at ffffffffc1313c5f [lustre]
#11 [ffffbba88ba1fd48] ll_dir_read at ffffffffc1313f38 [lustre]
        ll_prep_md_op_data()
#12 [ffffbba88ba1fe00] ll_iterate at ffffffffc13144dc [lustre]

Issue Links

• is related to: LU-3308 large readdir chunk size slows unlink/"rm -r" performance