panic: mmu_radix_pmap_page_exists_quick not yet tested
cpuid = 71
time = 1542401499
KDB: stack backtrace:
0xc0080000c2674450: at kdb_backtrace+0xb8
0xc0080000c2674560: at vpanic+0x25c
0xc0080000c2674610: at panic+0x3c
0xc0080000c2674640: at mmu_radix_pmap_page_exists_quick+0x2c
0xc0080000c26746b0: at vm_reserv_to_superpage+0x630
0xc0080000c2674750: at vm_reserv_to_superpage+0x1ab0
0xc0080000c2674870: at fork_exit+0xb0
0xc0080000c2674900: at fork_trampoline+0x18
0xc0080000c2674930: at -0x4
KDB: enter: panic
[ thread pid 17 tid 100462 ]
Stopped at      kdb_enter+0x78: ori     r0, r0, 0x0
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