[LU-9365] Sync data before get df data

• Type: Bug
• Resolution: Not a Bug
• Priority: Minor
• Severity: 3
• Assignee: Yang Sheng
• Reporter: Yang Sheng

Description

== sanity test 311: disable OSP precreate, and unlink should destroy objs ============================ 22:16:56 (1481926616)
total: 1000 creates in 3.08 seconds: 325.07 creates/second
 - unlinked 0 (time 1481926620 ; total 0 ; last 0)
total: 1000 unlinks in 2 seconds: 500.000000 unlinks/second
waited 120 sec, old Iused 5991, new Iused 9110
 sanity test_311: @@@@@@ FAIL: objs not destroyed after unlink 
  Trace dump:
  = /usr/lib64/lustre/tests/test-framework.sh:4970:error()
  = /usr/lib64/lustre/tests/sanity.sh:14395:test_311()
  = /usr/lib64/lustre/tests/test-framework.sh:5230:run_one()
  = /usr/lib64/lustre/tests/test-framework.sh:5268:run_one_logged()
  = /usr/lib64/lustre/tests/test-framework.sh:5072:run_test()
  = /usr/lib64/lustre/tests/sanity.sh:14397:main()
Dumping lctl log to /tmp/test_logs/1481926605/sanity.test_311.*.1481926744.log

After investigating i think statfs doesn't update in timely manner. So first 'lfs df' may not reflect real filesystem statistic. So we should consider doing a sync action while 'lfs df' in first place. Will push a patch for it.

Issue Links

• is related to: LU-5788 recovery-double-scale test_pairwise_fail: no enough free disk space