Re: nested EPT

[Jan Kiszka <jan.kiszka@siemens.com>]

On 2014-01-17 12:29, Kashyap Chamarthy wrote:
> On Fri, Jan 17, 2014 at 2:51 AM, duy hai nguyen <haind93@gmail.com> wrote:
>> Now I can run an L2 guest (nested guest)  using the kvm kernel module
>> of kernel 3.12
>>
>> However, I am facing a new problem when trying to build and use kvm
>> kernel module from git://git.kiszka.org/kvm-kmod.git: L1 (nested
>> hypervisor) cannot boot L2  and the graphic console of virt-manager
>> hangs displaying 'Booting from Hard Disk...'. L1 still runs fine.
>>
>> Loading kvm_intel with 'emulate_invalid_guest_state=0' in L0 does not
>> solve the problem. I have also tried with different kernel versions:
>> 3.12.0, 3.12.8 and 3.13.0 without success.
>>
>> Can you give me some suggestions?
> 
> Maybe you can try without graphical managers and enable serial console
> ('console=ttyS0') to your Kernel command-line of L2 guest, so you can
> see where it's stuck.

Tracing can also be helpful, both in L1 and L0:

http://www.linux-kvm.org/page/Tracing

Jan

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