Alpha deadlock

[Kris Kennaway]

One of the alpha machines has deadlocked; the running process is:

79102 fffffc001a451680 fffffe0014428000    0 78395 78391 0004000 [CPU 0] cp

which has the following process trace:

--- interrupt (from ipl 0) ---
critical_exit() at critical_exit+0x4c
_mtx_unlock_spin_flags() at _mtx_unlock_spin_flags+0xe4
witness_checkorder() at witness_checkorder+0x64c
_mtx_lock_flags() at _mtx_lock_flags+0x9c
vm_fault() at vm_fault+0x298
trap() at trap+0x554
XentMM() at XentMM+0x2c
--- memory management fault ---
bcopy() at bcopy+0x14
copyin() at copyin+0x38
uiomove() at uiomove+0x1cc
ffs_write() at ffs_write+0x4d8
vn_write() at vn_write+0x2a0
dofilewrite() at dofilewrite+0x130
write() at write+0x64
syscall() at syscall+0x36c
XentSys() at XentSys+0x64
--- syscall (4, FreeBSD ELF64, write) ---
--- user mode ---
db>

Kris
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