== sanity test 60c: unlink file when mds full ============ 18:10:34 (1788559834)
create 5000 files
 - open/close 433 (time 1788559849.90 total 10.00 last 43.29)
 - open/close 909 (time 1788559859.92 total 20.02 last 47.50)
 - open/close 1437 (time 1788559869.93 total 30.03 last 52.77)
 - open/close 1803 (time 1788559879.93 total 40.04 last 36.57)
 - open/close 2182 (time 1788559889.98 total 50.08 last 37.74)
 - open/close 2561 (time 1788559899.99 total 60.09 last 37.86)
 - open/close 2889 (time 1788559910.02 total 70.13 last 32.68)
 - open/close 3323 (time 1788559920.03 total 80.13 last 43.39)
 - open/close 3718 (time 1788559930.04 total 90.14 last 39.46)
 - open/close 4322 (time 1788559940.04 total 100.14 last 60.39)
 - open/close 4840 (time 1788559950.04 total 110.15 last 51.78)
total: 5000 open/close in 114.09 seconds: 43.83 ops/second
fail_loc=0x80000137
 - unlinked 0 (time 1788559958 ; total 0 ; last 0)
total: 5000 unlinks in 69 seconds: 72.463768 unlinks/second
fail_loc=0