Tracing command intr pid 11 tid 100011 td 0xc000000005581000 (CPU 0) 0xe000000042d22c00: at uart_intr+0x164 0xe000000042d22c50: at intr_event_handle+0x114 0xe000000042d22cf0: at powerpc_dispatch_intr+0xe8 0xe000000042d22d90: at openpic_dispatch+0xa4 0xe000000042d22dd0: at powerpc_interrupt+0x138 0xe000000042d22e60: kernel EXI trap by DELAY+0x50: srr1=0x80029000 r1=0xe000000042d23110 cr=0x82020c80 xer=0 ctr=0 r2=0xe000000000b48000 frame=0xe000000042d22e90 0xe000000042d23110: at 0xe000000042d2318c 0xe000000042d23190: at _mtx_lock_spin_cookie+0x110 0xe000000042d23220: at __mtx_lock_spin_flags+0x17c 0xe000000042d232d0: at witness_checkorder+0x3b8 0xe000000042d233e0: at __mtx_lock_flags+0xd0 0xe000000042d23490: at uma_timeout+0x148 0xe000000042d23570: at softclock_call_cc+0x1b0 0xe000000042d23680: at softclock+0xbc 0xe000000042d23710: at ithread_loop+0x2bc 0xe000000042d23820: at fork_exit+0xc4 0xe000000042d238c0: at fork_trampoline+0x18 0xe000000042d238f0: at -0x4