kernel trap 0 on amd64 SMP

[David Xu]

very fresh -CURRENT kernel code, when rebooting, the kernel panics with
trap fault 0. 

t43# cu -l /dev/ttyU0
Connected
Waiting (max 60 seconds) for system process `vnlru' to stop...done
Waiting (max 60 seconds) for system process `bufdaemon' to stop...done
Waiting (max 60 seconds) for system process `syncer' to stop...
Syncing disks, vnodes remaining...5 5 2 2 1 1 0 0 done
All buffers synced.
Uptime: 38s
Rebooting...
cpu_reset: Stopping other CPUs
kernel trap 0 with interrupts disabled


Fatal trap 0:  while in kernel mode
cpuid = 1; apic id = 01
instruction pointer     = 0xc520:0x0
stack pointer           = 0x10:0xffffffff8060c538
frame pointer           = 0x10:0xffffffff8060c4c0
code segment            = base 0xffffffffffff8048, limit 0xfe3c0, type 0x1f
                        = DPL 3, pres 1, long 1, def32 1, gran 1
processor eflags        = IOPL = 0
current process         = 10 (idle: cpu1)
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x100000077
fault code              = supervisor read data, page not present
instruction pointer     = 0x8:0xffffffff803fa2b3
stack pointer           = 0x10:0xffffffffa03f8910
frame pointer           = 0x10:0xffffffffa03f89e0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = resume, IOPL = 0
current process         = 1 (init)
kernel trap 12 with interrupts disabled

Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address   = 0x100000077
fault code              = supervisor read data, page not present
instruction pointer     = 0x8:0xffffffff803fa2b3
stack pointer           = 0x10:0xffffffffa03fd820
frame pointer           = 0x10:0xffffffffa03fd8f0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = resume, IOPL = 0
current process         = 10 (idle: cpu1)
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x100000077
fault code              = supervisor read data, page not present
instruction pointer     = 0x8:0xffffffff803fa2b3
stack pointer           = 0x10:0xffffffffa03f84d0
frame pointer           = 0x10:0xffffffffa03f85a0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = resume, IOPL = 0
current process         = 1 (init)


Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address   = 0x100000077
fault code              = supervisor read data, page not present
instruction pointer     = 0x8:0xffffffff803fa2b3
stack pointer           = 0x10:0xffffffffa03fd3e0
frame pointer           = 0x10:0xffffffffa03fd4b0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = resume, IOPL = 0
current process         = 10 (idle: cpu1)
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x100000077


Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address   = 0x100000077
fault code              = supervisor read data, page not present
instruction pointer     = 0x8:0xffffffff803fa2b3
stack pointer           = 0x10:0xffffffffa03fcfa0
frame pointer           = 0x10:0xffffffffa03fd070
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = resume, IOPL = 0
current process         = 10 (idle: cpu1)
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x100000077
fault code              = supervisor read data, page not present
instruction pointer     = 0x8:0xffffffff803fa2b3
stack pointer           = 0x10:0xffffffffa03f7c50
frame pointer           = 0x10:0xffffffffa03f7d20

code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = resume, IOPL = 0
current process         = 1 (init)
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address   = 0x100000077
fault code              = supervisor read data, page not present
instruction pointer     = 0x8:0xffffffff803fa2b3
stack pointer           = 0x10:0xffffffffa03fcb60
frame pointer           = 0x10:0xffffffffa03fcc30
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = resume, IOPL = 0

...
repeat, until get double fault.