== sanity test 60c: unlink file when mds full ============ 23:50:57 (1789185057)
create 5000 files
 - open/close 504 (time 1789185070.40 total 10.01 last 50.33)
 - open/close 969 (time 1789185080.43 total 20.04 last 46.40)
 - open/close 1401 (time 1789185090.43 total 30.04 last 43.17)
 - open/close 1876 (time 1789185100.45 total 40.05 last 47.44)
 - open/close 2322 (time 1789185110.45 total 50.06 last 44.58)
 - open/close 2761 (time 1789185120.45 total 60.06 last 43.89)
 - open/close 3215 (time 1789185130.47 total 70.08 last 45.34)
 - open/close 3697 (time 1789185140.48 total 80.09 last 48.15)
 - open/close 4156 (time 1789185150.49 total 90.10 last 45.84)
 - open/close 4635 (time 1789185160.49 total 100.10 last 47.90)
total: 5000 open/close in 107.83 seconds: 46.37 ops/second
fail_loc=0x80000137
 - unlinked 0 (time 1789185172 ; total 0 ; last 0)
total: 5000 unlinks in 79 seconds: 63.291138 unlinks/second
fail_loc=0