Bug 445553

Description of problem:

In two Intel S3200SH server motherboards, one with the 33 version of the BIOS 
and Xeon processor 3075, and another with the 39 version of the BIOS and Xeon
processor 3085, the 2.6.24 fedora 8 kernels generated the following boot error:

DMAR:DRHD (flags: 0x0000001c) base: 0x0000feb010000000

This error is written repeatedly on the screen and the system does not boot.

When trying to boot with argument "acpi = off", the systems boots, but the 
kernel detects the Xeon 3075 or 3085 processor as single core.

The systems boot correctly with 2.6.23 kernels.

Version-Release number of selected component (if applicable):

All 2.6.24 kernels.

How reproducible:

Update or install any 2.6.24 kernel in an Intel S3200SH server motherboard.

Steps to Reproduce:
1. Install the 2.6.24 kernel in an Intel server S3200SH motherboard.
2. Boot the system, the boot failed.
3. Put the acpi = off argument in the boot options, the system boot, but
cat /proc/cpuinfo report only one processor (processor 0).
  
Actual results:

cat /proc/cpuinfo

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 15
model name      : Intel(R) Xeon(R) CPU            3075  @ 2.66GHz
stepping        : 11
cpu MHz         : 2660.039
cache size      : 4096 KB
physical id     : 0
siblings        : 1
core id         : 0
cpu cores       : 1
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm const
ant_tsc up arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx smx est tm2
ssse3 cx16 xtpr lahf_lm
bogomips        : 5322.08
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

Additional info: