== sanity test 60c: unlink file when mds full ============ 18:10:25 (1788559825)
create 5000 files
 - open/close 509 (time 1788559839.66 total 10.01 last 50.85)
 - open/close 962 (time 1788559849.66 total 20.02 last 45.27)
 - open/close 1612 (time 1788559859.68 total 30.03 last 64.90)
 - open/close 2236 (time 1788559869.69 total 40.04 last 62.33)
 - open/close 2836 (time 1788559879.69 total 50.05 last 59.99)
 - open/close 3416 (time 1788559889.71 total 60.06 last 57.90)
 - open/close 3947 (time 1788559899.72 total 70.08 last 53.04)
 - open/close 4410 (time 1788559909.73 total 80.08 last 46.27)
total: 5000 open/close in 90.01 seconds: 55.55 ops/second
fail_loc=0x80000137
 - unlinked 0 (time 1788559923 ; total 0 ; last 0)
total: 5000 unlinks in 63 seconds: 79.365082 unlinks/second
fail_loc=0