== sanity test 60c: unlink file when mds full ============ 23:27:42 (1788665262)
create 5000 files
 - open/close 499 (time 1788665275.75 total 10.01 last 49.86)
 - open/close 1022 (time 1788665285.76 total 20.02 last 52.25)
 - open/close 1541 (time 1788665295.79 total 30.05 last 51.75)
 - open/close 2036 (time 1788665305.80 total 40.06 last 49.41)
 - open/close 2437 (time 1788665315.82 total 50.08 last 40.02)
 - open/close 2849 (time 1788665325.82 total 60.08 last 41.19)
 - open/close 3334 (time 1788665335.84 total 70.10 last 48.44)
 - open/close 3754 (time 1788665345.85 total 80.11 last 41.95)
 - open/close 4214 (time 1788665355.86 total 90.12 last 45.96)
 - open/close 4655 (time 1788665365.86 total 100.12 last 44.10)
total: 5000 open/close in 108.15 seconds: 46.23 ops/second
fail_loc=0x80000137
 - unlinked 0 (time 1788665377 ; total 0 ; last 0)
total: 5000 unlinks in 70 seconds: 71.428574 unlinks/second
fail_loc=0