Thanks a lot for your tests on HVM SMP guests support, here I think we
need make it more clear, actually on x86 we have 3 types of xen
hypervisors:
1) 32bit none-PAE xen hypervisor;
2) 32bit PAE xen hypervisor;
3) 64bit xen hypervisor,
and 3 types of HVM guests:
a) 32bit none-PAE HVM guests;
b) 32bit PAE HVM guests;
c) 64bit HVM guests.
On 1), we only support a)
On 2), we support a), and we are planning to support b), yet this is not
done yet :-(
On 3), we support a), b) and c).
>Failures:
>1. 32bit UP guest fail ltp gettimeofday02:
> "Time is going backwards"
>2. 32bit and 64bit guests fail first boot attempt after booting XEN:
> "(XEN) Failed vm entry, domain_crash_sync called from vmx.c"
>3. 32bit SMP guest hangs on boot after:
> "Uncompressing Linux... Ok, booting the kernel."
The default Redhat 32bit SMP kernel is PAE enabled, so if you are trying
to run it on 1), you got such results :-(, for this kind of SMP testing,
I suggest you compile a none PAE 32bit SMP kernel by your own.
If you are running it on 64bit xen hypervisor, only FC5 32bit SMP kernel
can successfully boot currently. The reason is on 2 sides, one is
because PS support is still not complete, and the other is old version
(2.6.12-) Linux kernel can not handle such cases, SMP code and PAE code
are mixed there.
We have a patch in hand to complete PS support on x86_64, and tests show
RHEL4 32bit SMP can successfully boot :-)
Hope my explaination is clear for you :-)
-Xin
>4. 64bit SMP guest fails testing:
> domU hangs under load
>5. 64bit SMP guest report these messages the XEN console:
> "(XEN) spurious IRQ irq got=-1"
>6. 64bit SMP guest report these messages the XEN console
>during testing:
> "(XEN) <vlapic_accept_irq>level trig mode repeatedly for
>vector 252"
>
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