RE: [Xen-devel] VMX status report 12033:b21246720fde

["Li, Xin B" <xin.b.li@xxxxxxxxx>]

>We have tested the latest xen on VT platform with Intel 915/E8500
>chipset. 
>
>Linux VMX domain test are based on SMP, It means that we boot up SMP
>Linux guest OS in VMX.
>
>We begin to add new cases to test IA32 and IA32E SMP Windows, and, now
>there are only ia32/ia32e UP/SMP Win2k3/WinXp cases.
>
>
>Here is the test summary:
>
>Issue:
>
>0). Linux guest OS may fail to boot up normally in VMX domain, guest OS
>complains "BUG: soft lockup detected on CPU#0!". 
>
>1). Windows and Linux VMX domains may fail to be created, the qemu-dm
>process is <defunct>, and the qemu log says "xs_read(): uuid 
>get error."
>
>2).UP Windows XP / Vista VMX domain causes Xen0 hangs 


Hi Keir, this bug is caused by a dead spin lock in printk: printk will
call __printk_ratelimit, but this guy may call printk again ( when lost
> 0 ).
After removing the call to printk in __printk_ratelimit, this bug is
gone.

-Xin


>
>3). IA32E UP/SMP Windows XP/2k3 can't boot up normally.

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