== sanity test 60c: unlink file when mds full ============ 12:18:34 (1789575514)
create 5000 files
 - open/close 505 (time 1789575529.11 total 10.01 last 50.45)
 - open/close 983 (time 1789575539.12 total 20.02 last 47.73)
 - open/close 1497 (time 1789575549.14 total 30.04 last 51.29)
 - open/close 1942 (time 1789575559.16 total 40.06 last 44.41)
 - open/close 2418 (time 1789575569.17 total 50.07 last 47.59)
 - open/close 2881 (time 1789575579.17 total 60.08 last 46.26)
 - open/close 3335 (time 1789575589.18 total 70.08 last 45.36)
 - open/close 3807 (time 1789575599.19 total 80.09 last 47.16)
 - open/close 4225 (time 1789575609.20 total 90.10 last 41.76)
 - open/close 4699 (time 1789575619.21 total 100.11 last 47.35)
total: 5000 open/close in 105.82 seconds: 47.25 ops/second
fail_loc=0x80000137
 - unlinked 0 (time 1789575629 ; total 0 ; last 0)
total: 5000 unlinks in 75 seconds: 66.666664 unlinks/second
fail_loc=0