[LU-8325] conf-sanity test_93:(mdt_handler.c:4495:mdt_fini()) ASSERTION( atomic_read(&d->ld_ref) == 0 ) failed:

• Type: Bug
• Resolution: Cannot Reproduce
• Priority: Minor
• Affects Version/s: Lustre 2.9.0
• Severity: 3
• Assignee: Di Wang
• Reporter: Maloo

Description

This issue was created by maloo for di.wang <[e-mail]>

This issue relates to the following test suite run: https://testing.hpdd.intel.com/test_sets/bd7dae9a-3a22-11e6-80b9-5254006e85c2.

The sub-test test_93 failed with the following error:

13:02:49:[25053.170583] Lustre: DEBUG MARKER: umount -d -f /mnt/lustre-mds3
13:02:49:[25059.735127] LustreError: 29270:0:(mdt_handler.c:4495:mdt_fini()) ASSERTION( atomic_read(&d->ld_ref) == 0 ) failed: 
13:02:49:[25059.737789] LustreError: 29270:0:(mdt_handler.c:4495:mdt_fini()) LBUG
13:02:49:[25059.739898] Pid: 29270, comm: umount
13:02:49:[25059.741789] 
13:02:49:[25059.741789] Call Trace:
13:02:49:[25059.745297]  [<ffffffffa05f27d3>] libcfs_debug_dumpstack+0x53/0x80 [libcfs]
13:02:49:[25059.747413]  [<ffffffffa05f2d75>] lbug_with_loc+0x45/0xc0 [libcfs]
13:02:49:[25059.749486]  [<ffffffffa0dc6f1e>] mdt_device_fini+0xebe/0xfc0 [mdt]
13:02:49:[25059.751596]  [<ffffffffa07dd54c>] class_cleanup+0x8dc/0xd70 [obdclass]
13:02:49:[25059.753695]  [<ffffffffa07dff2c>] class_process_config+0x1e2c/0x2f70 [obdclass]
13:02:49:[25059.755847]  [<ffffffffa05fd957>] ? libcfs_debug_msg+0x57/0x80 [libcfs]
13:02:49:[25059.757958]  [<ffffffffa07e115f>] class_manual_cleanup+0xef/0x810 [obdclass]
13:02:49:[25059.760089]  [<ffffffffa080eb3e>] server_put_super+0x8de/0xcd0 [obdclass]
13:02:49:[25059.762152]  [<ffffffff811e0ca6>] generic_shutdown_super+0x56/0xe0
13:02:49:[25059.764135]  [<ffffffff811e1082>] kill_anon_super+0x12/0x20
13:02:49:[25059.766292]  [<ffffffffa07e48c2>] lustre_kill_super+0x32/0x50 [obdclass]
13:02:49:[25059.768351]  [<ffffffff811e1439>] deactivate_locked_super+0x49/0x60
13:02:49:[25059.770261]  [<ffffffff811e1a36>] deactivate_super+0x46/0x60
13:02:49:[25059.772088]  [<ffffffff811fe9a5>] mntput_no_expire+0xc5/0x120
13:02:49:[25059.773886]  [<ffffffff811ffadf>] SyS_umount+0x9f/0x3c0
13:02:49:[25059.775662]  [<ffffffff816463c9>] system_call_fastpath+0x16/0x1b

Please provide additional information about the failure here.

Info required for matching: cont-sanity 93

I only saw this when testing the patch http://review.whamcloud.com/#/c/18651/ (LU-7809), but they seems unrelated. Unfortunately, there are no enough debug log here. I will close this one if they are related.

Issue Links

• is related to: LU-7809 general protection fault: 0000 during failback of MDS disk resources