== sanity test 60c: unlink file when mds full ============ 12:42:12 (1788540132)
create 5000 files
 - open/close 509 (time 1788540147.50 total 10.00 last 50.90)
 - open/close 1029 (time 1788540157.51 total 20.01 last 51.96)
 - open/close 1599 (time 1788540167.51 total 30.01 last 56.99)
 - open/close 1998 (time 1788540177.51 total 40.01 last 39.89)
 - open/close 2450 (time 1788540187.52 total 50.02 last 45.16)
 - open/close 2973 (time 1788540197.53 total 60.03 last 52.27)
 - open/close 3456 (time 1788540207.54 total 70.04 last 48.25)
 - open/close 3923 (time 1788540217.57 total 80.07 last 46.56)
 - open/close 4483 (time 1788540227.59 total 90.09 last 55.90)
 - open/close 4989 (time 1788540237.59 total 100.09 last 50.60)
total: 5000 open/close in 100.23 seconds: 49.89 ops/second
fail_loc=0x80000137
 - unlinked 0 (time 1788540242 ; total 0 ; last 0)
total: 5000 unlinks in 66 seconds: 75.757576 unlinks/second
fail_loc=0