Description of problem: On a IBM X3650/7979(71G) server booting the system with the xen kernel (2.6.18-53.1.4.el5xen) results in a kernel panic. Using the standard kernel (2.6.18-53.1.4.el5) the system boots fine. Since we have 2 identical X3650 servers which are both giving a kernel panic when booting in the xen kernel i think we can rule out faulty hardware. "Intel Virtual Technology" option is enabled in BIOS Version-Release number of selected component (if applicable): Xen version 3.1.0-53.1.4.el5 How reproducible: Every time Steps to Reproduce: 1. Boot Xen kernel 2. Panic Actual results: Kernel panic Expected results: Additional info: I've attached the kernel log.
Created attachment 290970 [details] Kernel panic log
We've seen this one before; it's most likely a BIOS bug. See https://bugzilla.redhat.com/show_bug.cgi?id=249300 for details, and check if there is an updated BIOS from your vendor. Chris Lalancette
When trying to open bug #249300 i get: You are not authorized to access bug #249300. Access to some bugs is restricted due to embargoed security issues or respect for customer and partner information which must remain confidential. Latest BIOS upgrade from IBM has been applied (1.07).
Issue has been resolved. Problem was caused by different CPU steppings. We changed one of the cpu's so both cpu's are now the same stepping. After that the xen kernel booted fine.
Closed as not a bug, per commment #4.