search for: cpuid4_cache_lookup

Hi, 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? Thanks, Anumeha

...following on screen. Can someone point me in the right direction. This machine has 24 cores and I allocated 1 for Centos to use with 1024MB of memory. Any clues or workaround to solve this problem? Thank you in advance. Unable to handle kernel NULL pointer dereference at 0000000000000040 RIP: [] cpuid4_cache_lookup+0x256/0x356 PGD 0 Oops: 0000 [1] SMP last sysfs file: CPU 0 Modules linked in: Pid: 1, comm: swapper Not tainted 2.6.18-194.el5 #1 RIP: 0010:[] [] cpuid4_cache_lookup+0x256/6 RSP: 0000:ffff81010fc75d60 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000060 RCX: 00000000000006aa RDX: 0000000...