== sanity test 60c: unlink file when mds full ============ 23:59:24 (1788839964)
create 5000 files
 - open/close 500 (time 1788839979.90 total 10.00 last 49.98)
 - open/close 949 (time 1788839989.90 total 20.01 last 44.89)
 - open/close 1419 (time 1788839999.91 total 30.02 last 46.94)
 - open/close 1876 (time 1788840009.94 total 40.05 last 45.58)
 - open/close 2358 (time 1788840019.94 total 50.05 last 48.17)
 - open/close 2813 (time 1788840029.95 total 60.06 last 45.46)
 - open/close 3265 (time 1788840039.96 total 70.07 last 45.17)
 - open/close 3753 (time 1788840049.98 total 80.09 last 48.70)
 - open/close 4182 (time 1788840060.01 total 90.11 last 42.80)
 - open/close 4612 (time 1788840070.02 total 100.13 last 42.94)
total: 5000 open/close in 108.31 seconds: 46.17 ops/second
fail_loc=0x80000137
 - unlinked 0 (time 1788840082 ; total 0 ; last 0)
total: 5000 unlinks in 76 seconds: 65.789474 unlinks/second
fail_loc=0