uvm_fault(fffffd806cac1400,200000001000,2,3) at uvm_fault+0x198 sys/uvm/uvm_fault.c:635
end trace frame: 0xffff80003c4a5020, count: 0
ddb{0}> trace
x86_ipi_db(ffffffff838a0ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670
comcnputc(800,3e) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline]
comcnputc(800,3e) at comcnputc+0x250 sys/dev/ic/com.c:1269
cnputc(3e) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(3e) at db_putchar+0x36d sys/ddb/db_output.c:155
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
db_printf(ffffffff8338ebfd) at db_printf+0x9b sys/kern/subr_prf.c:-1
panic(ffffffff833b665a) at panic+0x103 sys/kern/subr_prf.c:217
__assert(ffffffff833f0e63,ffffffff833451ec,4d4,ffffffff8342187a) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pagewire(fffffd80080219e0) at uvm_pagewire+0x1cd sys/uvm/uvm_page.c:1228
uvm_fault_upper(ffff80003c4a4ee0,ffff80003c4a4f18,ffff80003c4a4de0) at uvm_fault_upper+0x409 sys/uvm/uvm_fault.c:1159
uvm_fault(fffffd806cac1400,200000001000,2,3) at uvm_fault+0x198 sys/uvm/uvm_fault.c:635
uvm_fault_wire(fffffd806cac1400,200000001000,200000002000,3) at uvm_fault_wire+0x73 sys/uvm/uvm_fault.c:1703
uvm_map_pageable_wire(fffffd806cac1400,fffffd806cad2400,fffffd8060ebaba0,6c2,40,0) at uvm_map_pageable_wire+0x3dc sys/uvm/uvm_map.c:2125
sysctl_vslock(2000000011c0,4) at sysctl_vslock+0x106 sys/kern/kern_sysctl.c:201
kern_sysctl(ffff80003c4a5314,1,2000000011c0,ffff80003c4a5348,0,0,51c26877d421061f) at kern_sysctl+0xd17 sys/kern/kern_sysctl.c:726
sys_sysctl(ffff80003b027cb0,ffff80003c4a5480,ffff80003c4a53d0) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1
syscall(ffff80003c4a5480) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c4a5480) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x608b26a0a70, count: -21
ddb{0}> machine ddbcpu 1
Stopped at      proc_trampoline+0xc7:   movl    $0,%gs:0x688
proc_trampoline() at proc_trampoline+0xc7
end of kernel
end trace frame: 0x76d56c1177b0, count: 14
ddb{1}> trace
proc_trampoline() at proc_trampoline+0xc7
end of kernel
end trace frame: 0x76d56c1177b0, count: -1