== sanity test 60c: unlink file when mds full ============ 11:02:27 (1781622147)
create 5000 files
 - open/close 782 (time 1781622160.05 total 10.00 last 78.17)
 - open/close 1511 (time 1781622170.06 total 20.01 last 72.83)
 - open/close 2239 (time 1781622180.06 total 30.01 last 72.79)
 - open/close 2925 (time 1781622190.07 total 40.03 last 68.50)
 - open/close 3268 (time 1781622200.10 total 50.05 last 34.23)
 - open/close 3627 (time 1781622210.10 total 60.05 last 35.89)
 - open/close 3986 (time 1781622220.14 total 70.09 last 35.76)
 - open/close 4352 (time 1781622230.14 total 80.09 last 36.59)
 - open/close 4777 (time 1781622240.15 total 90.11 last 42.45)
total: 5000 open/close in 96.19 seconds: 51.98 ops/second
fail_loc=0x80000137
 - unlinked 0 (time 1781622253 ; total 0 ; last 0)
total: 5000 unlinks in 70 seconds: 71.428574 unlinks/second
fail_loc=0