Linux guest and host, guest can't boot with IO-APIC after update to 3.0.12

[Brian Prodoehl]

I've been running a CentOS 5.4 64-bit guest (kernel 2.6.18-164.6.1.el5) under a Fedora 11 64-bit host (kernel 2.6.30.9-96.fc11.x86_64), with VirtualBox 3.0.10 and ACPI, IO-APIC and AMD-V enabled. After the update to 3.0.12, the guest would no longer boot (it got a kernel panic immediately). I disabled IO-APIC in the configuration, and the guest boots again.

CPU info (same for second core):

processor	: 0
vendor_id	: AuthenticAMD
cpu family	: 17
model		: 3
model name	: AMD Turion(tm) X2 Dual-Core Mobile RM-70
stepping	: 1
cpu MHz		: 500.000
cache size	: 512 KB
physical id	: 0
siblings	: 2
core id		: 0
cpu cores	: 2
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 1
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36
  clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow
  constant_tsc rep_good nonstop_tsc extd_apicid pni cx16 lahf_lm cmp_legacy svm
extapic cr8_legacy 3dnowprefetch osvw skinit
bogomips	: 4000.11
TLB size	: 1024 4K pages
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate

[Brian Prodoehl]

Sorry, I failed to set the guest and host types, both are Linux.

[Frank Mehnert]

Please add the kernel parameter nmi_watchdog=0 to the guest kernel command line.