# DF-2755 FIXED-kernel validation runs (fix.diff applied in-guest,
# nativekernel X86_64_GENERIC #1 Mon Aug 31 20:54:26 UTC 2026, INVARIANTS)
$ ./df2755 3 45
[*] leader pid 833 master=3 slave=4 (/dev/pts/0)
[*] 3 racer threads per side, 45s
[*] iterations master-side=35325335 slave-side=35627425
[*] churn done, exiting cleanly (no crash observed)
FIXED_RUN1_RC=0

$ ./df2755 5 90
[*] leader pid 838 master=3 slave=4 (/dev/pts/0)
[*] 5 racer threads per side, 90s
[*] iterations master-side=69080324 slave-side=73587537
[*] churn done, exiting cleanly (no crash observed)
FIXED_RUN2_RC=0

$ ./df2755 4 60
[*] leader pid 839 master=3 slave=4 (/dev/pts/0)
[*] 4 racer threads per side, 60s
[*] iterations master-side=47287062 slave-side=49090262
[*] churn done, exiting cleanly (no crash observed)
FIXED_RUN3_RC=0

# 309,517,530 racer iterations on the patched kernel: zero panics,
# zero anomalies, guest healthy. Stock kernel panicked 2/2 within the
# first run window (seconds..tens of seconds).

# ctty semantics sanity on fixed kernel (TIOCSCTTY + TIOCGPGRP + /dev/tty):
$ ./ctty_sanity
child exit=0 (0 = ctty semantics OK)
SANITY_RC=0