== sanity test 60c: unlink file when mds full ============ 10:55:10 (1790780110)
create 5000 files
 - open/close 512 (time 1790780124.68 total 10.01 last 51.16)
 - open/close 1053 (time 1790780134.68 total 20.01 last 54.08)
 - open/close 1627 (time 1790780144.70 total 30.02 last 57.33)
 - open/close 2130 (time 1790780154.72 total 40.04 last 50.20)
 - open/close 2599 (time 1790780164.72 total 50.04 last 46.90)
 - open/close 3060 (time 1790780174.72 total 60.05 last 46.08)
 - open/close 3571 (time 1790780184.73 total 70.05 last 51.07)
 - open/close 4035 (time 1790780194.74 total 80.07 last 46.33)
 - open/close 4443 (time 1790780204.75 total 90.08 last 40.75)
 - open/close 4770 (time 1790780214.77 total 100.10 last 32.64)
total: 5000 open/close in 105.84 seconds: 47.24 ops/second
fail_loc=0x80000137
 - unlinked 0 (time 1790780226 ; total 0 ; last 0)
total: 5000 unlinks in 75 seconds: 66.666664 unlinks/second
fail_loc=0