[PATCH 0/2] kvm: disable virtualization on kdump

Avi Kivity avi at redhat.com
Wed Oct 29 16:29:27 EDT 2008

Eduardo Habkost wrote:
>> We boot kdump kernel with maxcpus=1. IIUC, in that code path we will not
>> be using INIT. So did you try booting kdump kernel with maxcpus=1 and did
>> it work for you? If not than problem could be something else.

vmx also disallows changing some bits in cr0 and cr4; for example you 
can't switch off paging.  This may interfere with the boot sequence.

The full set of pleasant surprises is detailed in section 19.8 of the 

I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

More information about the kexec mailing list