[Xen-bugs] [Bug 1277] GPLPV /gplpv boot does not support uni-processor?

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1277





------- Comment #3 from jweber@xxxxxxxxxxx  2008-06-24 17:32 -------
I have tried using the Windows debug techniques described on the GPLPV wiki
page, with no success.  It seems the virtual starts/stops rapidly or such when
encountering the error.  The HWVSP3 LAN status goes flips between
connected/closed rapidly in this state.

Was hoping I could provide more detailed output for this to diagnose, but as of
yet my assumption is all we have.

Basically if Windows 2003 was installed with single processor and "Computer"
under device manager is "APIC Uni-processor system" you will reproduce this
issue after installing the Xen PV drivers.

To resolve this you can change your VM configuration for the Windows 2003 host
to use vcpus=2 (more than 1 CPU) and then boot the host using non GPLPV
drivers.
Windows hardware wizard will denote that you have APIC Multi-processor
capability and automaticatlly udate the driver to the APIC Multiprocessor
driver, you can verify this in Hardware/Computer details for your system in
Windows.  After such I don't think it matters if you use 1cpu or 2cpu as long
as the APIC Multiprocessor driver is being used.  GPLPV will boot proper after
this change.


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