Thanks. I will indeed install Cent OS 5.8 and see if that resolves the issue. RHEL 5 had released some kernel-xen patch to address this issue. So, just wanted to know if a similar thing is available for CentOS. On Thu, Jul 19, 2012 at 5:17 PM, James Hogarth <james.hogarth at gmail.com>wrote: > > Cent OS 5.5 x64 does not boot on certain AMD-based servers. Following > error > > is displayed: > > > > Code: 8b 72 40 48 8d 4c 24 1c 48 8b 7a 20 ba c4 01 00 00 e8 5f 77 > > RIP [<ffffffff8008192f>] cpuid4_cache_lookup+0x256/0x356 > > RSP <ffff810104737d60> > > CR2: 000000000040 > > <0>Kernel panic -- not syncing: Fatal exception > > This issue was noticed on Dell PowerEdge R715 with AMD Opteron 12-core > > processor. Is there any kernel specific patch which addresses this issue? > > Have you tried installing the most recent release (5.8 or 6.3 > depending on your requirements)? > > 5.5 is pretty ancient and only the current code is supported for a > given major revision number (ie CentOS5 or CentOS6 at this time given > that CentOS5 is now end of life). > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >