Xen devel - Apr 2006 - RE: Xm-test fails to pass sanity checks in hvm mode

>
>It won''t boot an SMP kernel. I bet the default kernel
you''re building
>with is SMP, right? HVM doesn''t support SMP yet, I believe,
although
>Intel people are working on that. I haven''t debugged any further
but
>I''ve confirmed that an SMP kernel on the disk.img won''t
boot.
I''m not in the context, but still have some comments here :-).
Basically we *can* boot a SMP kernel in a UP VMX domain. To boot up a
SMP kernel, we need vcpus > 1, acpi = 1 and apic = 1 in the config file,
or you are just running a UP VMX domain.
Some old version Linux SMP kernel can *not* boot in a SMP VMX domain,
but the root cause is PAE support code, which is mixed with SMP code in
Linux kernel :-(, newer version Linux, like 2.6.12+, should work.
Actually we have a fix to this PAE issue, but more tests needed.

-Xin

>
>Thanks,
>
>Dan
>
>
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On Wed, 2006-04-12 at 05:59 +0800, Li, Xin B wrote:
> >
> >It won''t boot an SMP kernel. I bet the default kernel
you''re building
> >with is SMP, right? HVM doesn''t support SMP yet, I believe,
although
> >Intel people are working on that. I haven''t debugged any
further but
> >I''ve confirmed that an SMP kernel on the disk.img
won''t boot.
> 
> I''m not in the context, but still have some comments here :-).
> Basically we *can* boot a SMP kernel in a UP VMX domain. To boot up a
> SMP kernel, we need vcpus > 1, acpi = 1 and apic = 1 in the config file,
> or you are just running a UP VMX domain.
> Some old version Linux SMP kernel can *not* boot in a SMP VMX domain,
> but the root cause is PAE support code, which is mixed with SMP code in
> Linux kernel :-(, newer version Linux, like 2.6.12+, should work.
> Actually we have a fix to this PAE issue, but more tests needed.

Are you using the qemu-dm that''s in the xen-unstable tree? 

I can''t get the SMP kernel to boot. I got a 2.6.16 SMP kernel, made
sure
the options were set in the config, and I get the following error
repeatedly:

"Unknown interrupt or fault at EIP 00000060 c0100295 0000294"

Either way, if you''d like to do more testing using xm-test - then it
will need to be patched to have the correct config options.

Thanks,

Dan






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