I'm encountering (randomly) the below error when trying to install
351901 from CD/DVD.
timeout stopping cpus
panic: acquiring blockable sleep lock with spinlock or critical section
held (sleep mutex) vm map (system) @ /usr/src/sys/vm/vm_map.c:4066
cpuid = 0
time = 1
KDB: stack backtrace:
0xe0008879d4f0: at .kdb_backtrace+0x5c
0xe0008879d620: at .vpanic+0x1b4
0xe0008879d6e0: at .panic+0x38
0xe0008879d770: at .witness_checkorder+0xf4
0xe0008879d860: at .__mtx_lock_flags+0xfc
0xe0008879d910: at ._vm_map_lock_read+0x34
0xe0008879d990: at .vm_map_lookup+0x94
0xe0008879dad0: at .vm_fault_hold+0x158
0xe0008879dcf0: at .vm_fault+0x94
0xe0008879dda0: at .cpu_fetch_syscall_args+0x404
0xe0008879de50: at .trap+0xf28
0xe0008879e010: at .powerpc_interrupt+0x290
0xe0008879e0b0: kernel DSI read trap @ 0x392 by
.sched_relinquish+0x290: srr1=0x90001032
r1=0xe0008879e360 cr=0x20009032 xer=0 ctr=0xc2ea198c
r2=0xc393f7e0 sr=0x4000
0xe0008879e360: at .sched_tdname+0xbc
0xe0008879e3f0: at .sched_switch+0x414
0xe0008879e530: at .mi_switch+0x2d4
0xe0008879e5c0: at .sched_bind+0xd8
0xe0008879e650: at .taskqgroup_config_gtask_init+0x108
0xe0008879e700: at .gtaskqueue_cancel+0x2ac
0xe0008879e7c0: at .taskqgroup_adjust+0xb0c
0xe0008879e850: at .fork_exit+0xd0
0xe0008879e8f0: at .fork_trampoline+0x10
0xe0008879e920: at -0x4
KDB: enter: panic
[ thread pid 0 tid 100144 ]
Stopped at .kdb_enter+0x60: ld r2, r1, 0x28
db>
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