[LU-7326] ost-pools hangs on OST unmount

• Type: Bug
• Resolution: Duplicate
• Priority: Minor
• Affects Version/s: Lustre 2.8.0
• Environment: autotest
• Severity: 3
• Assignee: WC Triage
• Reporter: James Nunez (Inactive)

Description

ost-pools hangs on unmount of an OST. No individual tests fails and there are no errors in the last test run; test 26 in ost-pools. Just the unmounting of one of the OSTs in test clean up hangs. Logs are at https://testing.hpdd.intel.com/test_sets/ea392e2a-776b-11e5-a00c-5254006e85c2

The last thing we see in the suite_stdout log is:

16:16:45:Stopping /mnt/ost7 (opts:-f) on shadow-6vm7
16:16:45:CMD: shadow-6vm7 umount -d -f /mnt/ost7
16:16:56:CMD: shadow-6vm7 lsmod | grep lnet > /dev/null && lctl dl | grep ' ST '
16:16:56:CMD: shadow-6vm7 grep -c /mnt/ost8' ' /proc/mounts
16:16:56:Stopping /mnt/ost8 (opts:-f) on shadow-6vm7
16:16:56:CMD: shadow-6vm7 umount -d -f /mnt/ost8
17:14:51:********** Timeout by autotest system **********

This failure was on the master branch in review-dne-part-2. There are other similar hangs on unmount of the OSTs in ost-pools for some 'full' group test sessions. Logs for these are at
2015-10-03 02:46:25 - https://testing.hpdd.intel.com/test_sets/a436aad2-69ed-11e5-9fbf-5254006e85c2
2015-10-07 04:38:39 - https://testing.hpdd.intel.com/test_sets/c7a37340-6d19-11e5-ab7f-5254006e85c2
2015-10-07 05:32:11 - https://testing.hpdd.intel.com/test_sets/4398325c-6cd8-11e5-96b4-5254006e85c2

Issue Links

• is related to: LU-7221 replay-ost-single test_3: ASSERTION( __v > 0 && __v < ((int)0x5a5a5a5a5a5a5a5a) ) failed: value: 0
• is related to: LU-7038 obdfilter-survey test_3a: (lu_object.c:1224:lu_device_fini()) ASSERTION( atomic_read(&d->ld_ref) == 0 ) failed: Refcount is 3