Opteron 6000-series HP DL585-G7

RedHat ES 5.5 go to Kernel Panic on boot (also with the installer) with video message:

Code: 8b 72 40 48 8d 4c 24 1c 48 8b 7a 20 ba c4 01 00 00 e8 5f 77
RIP [] cpuid4_cache_lookup+0x256/0x356
RSP
CR2: 0000000000000040
<0>Kernel panic - not syncing: Fatal exception

There isn't valid kernel boot parameter in RHEL 5.5 , only RHEL 5.4 with apic=bigsmp is able to start.
RHEL 5.6 with the new kernel hasn't any problem to boot!


HP KB-Notes

RedHat KB-Notes

In a VmWare environment the only possibility to install a RedHat 5.5 is setting EVC mode and abstract cpu version at the linux kernel

EVC and CPU Compatibility FAQ KB article 1005764

Enhanced VMotion Compatibility (EVC) processor support KB article 1003212