[Xen-bugs] [Bug 1277] New: GPLPV /gplpv boot option resutls in BSOD or "NTLDR corrupt" when DomU is configured as uni-processor

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

           Summary: GPLPV /gplpv boot option resutls in BSOD or "NTLDR
                    corrupt" when DomU is configured as uni-processor
           Product: Xen
           Version: 3.0.2
          Platform: x86-64
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: winpv
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: jweber@xxxxxxxxxxx


It seems that the GPLPV 0.9.10 (at least, although I think 0.9.8 and those
versions in between have same issue) when booting with /gplpv result in a blue
screen with exception code 0x0000007B or "NTLDR corrupted" message when the
DomU is configured for uni-processor (vcpu=1).  Also, if you try to boot using
safe-mode it will reboot after printing WINDOWS\system32\apcitabl.dat.

The above occurs when booting either the /gplpv kernel or the original Windows
boot.ini kernel.  I essentially could not get Windows to boot at all anymore. 
I even tried booting from CD and doing a repair of the install, which
afterwards resulted in the same symptoms.

Apparently changing my DomU configuration to vcpu=2 has resolved this and
allowed me to boot into Windows again and verify that the disk and network
devices are using the GPLPV drivers.


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