[Xen-bugs] [Bug 252] system crash while creating DomU on a large memorysystem/PAEenabled

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=252


aravindh.puthiyaparambil@xxxxxxxxxx changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |xen-bugs@xxxxxxxxxxxxxxxxxxx
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED




------- Additional Comments From aravindh.puthiyaparambil@xxxxxxxxxx  
2005-10-11 21:31 -------
> -----Original Message-----
> From: Nakajima, Jun [mailto:jun.nakajima@xxxxxxxxx]

> But we don't want to see unexpected #AC in ring0. Can check the bit 4 
> (Split-Lock Disable) and 8 (Suppress Lock Enable) of IA32_MISC_ENABLE 
> MSR (0x1a0)? You may have set the bit 4. You want to set the bit 8,
not
> bit 4.

I ended up writing a module which checked the IA32_MISC_ENABLE MSR on my system.
I found that it was being set incorrectly for some logical processors. Bringing
up a DomU (prior to fixing up the pfn_info structure) on one of these processors
was the reason why the alignment check was being thrown. This was on a test
system which was running a beta BIOS. This BIOS bug has been fixed now.



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