Description of problem: Error message thrown when the system with XEN kernel boots up. MCFG area at a0000000 is not E820 reserved Version-Release number of selected component (if applicable): RHEL 5.3 How reproducible: Often Steps to Reproduce: 1. Reboot the system 2. Look at the messages 3. Actual results: MCFG area at a0000000 is not E820 reserved, error message is displayed Expected results: There should be no error message Additional info: I was told that this error message is benign and does not harm the system.
Fixed by 7b80b7bb When you boot up the Xen kernel as either a dom0 or a domU, the boot messages always include: PCI: BIOS Bug: MCFG area at e0000000 is not E820-reserved That's because the e820 mapped passed from the hypervisor to any domain, including dom0, is always one large RAM region; there are no holes. Silence this totally bogus warning on Xen, since it is not a bug there. (v2: only silence the "BIOS BUG" message, but still print the "Not using MMCONFIG" for debugging) *** This bug has been marked as a duplicate of bug 462572 ***
Abdul - this was fixed in in kernel-2.6.18-137.el5 You can download this test (or any newer) kernel from http://people.redhat.com/dzickus/el5 Please re-open if you see any issues.
Clearing out old flags for reporting purposes. Chris Lalancette