# DF-5315 validation on PATCHED kernel (fix.diff from the DF-5314 pack,
# which adds the USB_FS_OPEN setup-claim), kernel #1 15:25:39, maxx:
$ ./df5315 12
[*] t+10s: successful opens: 9 + 491
[*] t+11s: successful opens: 9 + 540
[*] t+12s: successful opens: 10 + 590
[+] race done: successful opens: 10 + 590
POST-CLEANUP OPEN SUCCEEDED (endpoint not exhausted yet -- run longer /
check vmstat -m for M_USB growth)
RUN515_RC=0
# - opens now SERIALISE (claim/publish protocol): 600 successful opens,
#   counters never freeze, no EBUSY-storm, no exhaustion
# - POST-CLEANUP OPEN SUCCEEDS = no orphaned refcount
# - vmstat -m USB after the whole validation suite (this + df5314c 3000
#   rounds + df5288 100 s + FS smoke): 270 allocs / 844K -- zero orphans