== sanity test 60c: unlink file when mds full ============ 22:50:15 (1789181415)
create 5000 files
 - open/close 631 (time 1789181429.76 total 10.01 last 63.04)
 - open/close 1201 (time 1789181439.79 total 20.05 last 56.79)
 - open/close 1704 (time 1789181449.79 total 30.05 last 50.29)
 - open/close 2209 (time 1789181459.81 total 40.06 last 50.44)
 - open/close 2643 (time 1789181469.83 total 50.08 last 43.30)
 - open/close 3158 (time 1789181479.84 total 60.10 last 51.43)
 - open/close 3666 (time 1789181489.86 total 70.12 last 50.71)
 - open/close 4096 (time 1789181499.86 total 80.12 last 42.99)
 - open/close 4559 (time 1789181509.87 total 90.13 last 46.26)
total: 5000 open/close in 98.05 seconds: 51.00 ops/second
fail_loc=0x80000137
 - unlinked 0 (time 1789181521 ; total 0 ; last 0)
total: 5000 unlinks in 70 seconds: 71.428574 unlinks/second
fail_loc=0