|Summary:||Kernel panic on kernel load during installation|
|Product:||Red Hat Enterprise Linux 4||Reporter:||allance <allance.chen>|
|Component:||kernel||Assignee:||Jim Paradis <jparadis>|
|Status:||CLOSED DUPLICATE||QA Contact:||Brian Brock <bbrock>|
|Version:||4.0||CC:||akeshava, jbaron, jparadis, peterm|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2006-09-28 23:44:30 UTC||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
Description allance 2006-04-11 06:29:02 UTC
Description of problem: Install RHEL AS4 U3 64bit with more than 4G memory size.When system boot from OS installation CD1, then "Kernel Panic" occurs on kernel load. The message is âKernel Panic-not syncing" PCI-DMA: high address but no IOMMU.â There is a workaround to add "pic=nommconf" to disable MCFG table in installation option menu. Only happen on RH4, RH3 is ok. Version-Release number of selected component (if applicable): How reproducible: 1.Boot from installation CD1. 2.In install main menu, Press âenterâ to start installation. 3."Kernel Panic - not syncing: PCI-DMA: high address but no IOMMU" message pop up. Steps to Reproduce: 1.Boot from installation CD1. 2.In install main menu, Press âenterâ to start installation. 3."Kernel Panic - not syncing: PCI-DMA: high address but no IOMMU" message pop up. Actual results: Expected results: Hope this can be fixed in next build. Additional info:
Comment 2 Anil S Keshavamurthy 2006-05-08 22:43:17 UTC
Are you sure you are seeing this on IA64 and not on x86_64. The reason is that I did not see the panic("PCI-DMA: high address but no IOMMU.\n"); statement in arch/ia64 directory. However I saw this the above statement in arch/x86_64/kernel/pci-gart.c. Can you verify this and change the bug to appropriate architecture.
Comment 3 allance 2006-05-09 00:51:25 UTC
Sorry for mistake. I have changed the architecture to x86_64
Comment 4 Dan Carpenter 2006-05-09 02:52:58 UTC
What's the motherboard and which CPUs are you using?
Comment 5 allance 2006-05-09 03:09:13 UTC
It designed with nVidia MCP55P SB and AMD Opetron Dual core Socket F processor. It doesn't matter what cpu speed is.
Comment 6 Jim Paradis 2006-06-22 18:38:41 UTC
Have you tried the latest RHEL4 U4 kernel on this configuration? I have the feeling this *might* be related to Bug 162977, which is fixed in the latest beta.