== sanity test 60c: unlink file when mds full ============ 16:26:37 (1789331197)
create 5000 files
 - open/close 1488 (time 1789331209.04 total 10.01 last 148.70)
 - open/close 2976 (time 1789331219.04 total 20.01 last 148.77)
 - open/close 4457 (time 1789331229.04 total 30.01 last 148.06)
total: 5000 open/close in 33.64 seconds: 148.63 ops/second
fail_loc=0x80000137
 - unlinked 0 (time 1789331234 ; total 0 ; last 0)
total: 5000 unlinks in 22 seconds: 227.272720 unlinks/second
fail_loc=0