== sanity test 60c: unlink file when mds full ============ 18:18:21 (1789683501)
create 5000 files
 - open/close 565 (time 1789683516.45 total 10.01 last 56.43)
 - open/close 1024 (time 1789683526.46 total 20.01 last 45.89)
 - open/close 1588 (time 1789683536.46 total 30.02 last 56.36)
 - open/close 2084 (time 1789683546.48 total 40.04 last 49.50)
 - open/close 2589 (time 1789683556.49 total 50.04 last 50.48)
 - open/close 3088 (time 1789683566.49 total 60.05 last 49.85)
 - open/close 3606 (time 1789683576.50 total 70.05 last 51.79)
 - open/close 4084 (time 1789683586.51 total 80.07 last 47.73)
 - open/close 4611 (time 1789683596.51 total 90.07 last 52.70)
total: 5000 open/close in 97.24 seconds: 51.42 ops/second
fail_loc=0x80000137
 - unlinked 0 (time 1789683609 ; total 0 ; last 0)
total: 5000 unlinks in 70 seconds: 71.428574 unlinks/second
fail_loc=0