x86_64 interrupts handled by CPU0 only

Are all interrupts supposed to be handled by CPU0 on x86_64, or is something amiss? I'm getting the following on Mandrake Corporate Server 2.1:

---
[root@lab180 root]# uname -r -v -m -o
2.4.19-31mdksmp #1 SMP Thu Apr 17 09:34:46 EDT 2003 x86_64 GNU/Linux [root@lab180 root]# cat /proc/interrupts
CPU0 CPU1

  0:     447602          0    IO-APIC-edge  timer
  1:        424          0    IO-APIC-edge  keyboard
  2:          0          0          XT-PIC  cascade
 12:        851          0    IO-APIC-edge  PS/2 Mouse
 14:      25038          1    IO-APIC-edge  ide0
 15:       4930          1    IO-APIC-edge  ide1
 19:          0          0   IO-APIC-level  usb-ohci, usb-ohci
 24:     105196          0   IO-APIC-level  ioc0, eth0
 25:         46          0   IO-APIC-level  ioc1
NMI:       2235       3808
LOC:     447494     447555
ERR:          0
MIS:          0

---

I see this behavior on systems using either the MSI or Tyan dual-opteron boards. I also see it on RedHat's preview x86_64 distribution (kernel version 2.4.20-9.2).

I'm still trying to get 2.5.69 to boot correctly, so I don't have results there yet. On RedHat it hangs after "Booting the kernel..." (and yes, I have CONFIG_VT, and CONFIG_VT_CONSOLE on). Any ideas?

System info:

---
[root@lab180 root]# cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 15
model : 5
model name : AMD Opteron(TM) 64 Processor 242
stepping : 0
cpu MHz : 1594.727
cache size : 1024 KB
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov
pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext lm 3dnowext 3dnow
bogomips : 3178.49
TLB size : 1088 4K pages
clflush size : 64
address sizes : 40 bits physical, 48 bits virtual
power management: ts ttp

processor : 1
vendor_id : AuthenticAMD
cpu family : 15
model : 5
model name : AMD Opteron(TM) 64 Processor 242
stepping : 0
cpu MHz : 1594.727
cache size : 1024 KB
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov
pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext lm 3dnowext 3dnow
bogomips : 3185.04
TLB size : 1088 4K pages
clflush size : 64
address sizes : 40 bits physical, 48 bits virtual
power management: ts ttp

[root@lab180 root]# lspcidrake
unknown : Advanced Micro Devices|AMD-8111 PCI
unknown : Advanced Micro Devices|AMD-8111 LPC
unknown : Advanced Micro Devices|AMD-8111 IDE
unknown : Advanced Micro Devices|AMD-8111 ACPI
unknown : Advanced Micro Devices|AMD-8131 PCI-X Bridge
unknown : Advanced Micro Devices|AMD-8131 PCI-X APIC
unknown : Advanced Micro Devices|AMD-8131 PCI-X Bridge
unknown : Advanced Micro Devices|AMD-8131 PCI-X APIC
unknown : Advanced Micro Devices|K8 NorthBridge
unknown : Advanced Micro Devices|K8 NorthBridge
unknown : Advanced Micro Devices|K8 NorthBridge
unknown : Advanced Micro Devices|K8 NorthBridge
unknown : Advanced Micro Devices|K8 NorthBridge
unknown : Advanced Micro Devices|K8 NorthBridge
unknown : Advanced Micro Devices|K8 NorthBridge
unknown : Advanced Micro Devices|K8 NorthBridge
usb-ohci : Advanced Micro Devices|AMD-8111 USB
usb-ohci : Advanced Micro Devices|AMD-8111 USB
unknown : unknown (105a/3373/ffff/ffff)
Card:ATI Mach64 Utah: ATI|Rage XL
bcm5700 : Broadcom Corporation|BCM5704 CIOB-E 1000BaseTX
bcm5700 : Broadcom Corporation|BCM5704 CIOB-E 1000BaseTX
mptscsih : Symbios|53c1030
mptscsih : Symbios|53c1030
unknown : Virtual|Hub []
unknown : Virtual|Hub []
---

Will Dinkel <[email protected]>
Atipa Technologies

please use irqbalanced ;)

Hi!

Turn *on* CONFIG_HUGETLB_PAGE or how is it called.
Pavel

When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]