panic: LOCKDEBUG
Stopped in pid 0.46 (system) at netbsd:cpu_Debugger+0x10:       lwz     r0, 0x14(r1)
db> bt
0xaa463640: at vpanic+0x21c
0xaa463670: at panic+0x4c
0xaa4636b0: at lockdebug_abort1+0xdc
0xaa4636d0: at mutex_abort+0x50
0xaa4636e0: at mutex_enter+0x26c
0xaa463720: at pool_get+0x7c
0xaa463760: at pmap_pvo_enter+0xffffb180
0xaa4637b0: at pmap32_kenter_pa+0xd0
0xaa4637d0: at uvm_km_kmem_alloc+0x128
0xaa463830: at pool_page_alloc+0x30
0xaa463850: at pool_grow+0x6c
0xaa463890: at pool_get+0x29c
0xaa4638d0: at pool_cache_get_slow+0x214
0xaa463900: at pool_cache_get_paddr+0x290
0xaa463950: at vr_rxeof+0x3f4
0xaa4639c0: at vr_intr+0x314
0xaa463a00: at intr_deliver+0x7c
0xaa463a40: at pic_do_pending_int+0x1a0
0xaa463a90: at splx+0x5c
0xaa463aa0: at lockdebug_unlocked+0x190
0xaa463ad0: at mutex_exit+0x194
0xaa463af0: at pool_get+0x1f8
0xaa463b30: at pmap_pvo_enter+0xffffb180
0xaa463b80: at pmap32_kenter_pa+0xd0
0xaa463ba0: at uvm_km_kmem_alloc+0x128
0xaa463c00: at pool_page_alloc+0x30
0xaa463c20: at pool_grow+0x6c
0xaa463c60: at pool_get+0x29c
0xaa463ca0: at pool_cache_get_slow+0x214
0xaa463cd0: at pool_cache_get_paddr+0x290
0xaa463d20: at nfsm_disct+0x38c
0xaa463d70: at nfsm_loadattrcache+0x6c
0xaa463da0: at nfs_readrpc+0x58c
0xaa463e30: at nfs_doio+0x694
0xaa463ee0: at nfssvc_iod+0x1c4
0xaa463f20: at cpu_lwp_bootstrap+0xc
0xaa463fe4: at 0xd790e90
saved LR(0xfffffffb) is invalid.
db> x/x last_ncpl
netbsd:last_ncpl:       7
db> x/x last_last_ncpl
netbsd:last_last_ncpl:  7