RE: [Xen-devel] xen unstable crashes ...

["Nakajima, Jun" <jun.nakajima@xxxxxxxxx>]

Gerd Knorr wrote:
> ... when built with optimize=n debug=y
> 
> I get first a line like this one:
> 
>   (XEN) (file=extable.c, line=76) Pre-exception: ff105b48 -> 00000000
> 
> Then xen dies because of a page fault in IRQ context:
> 
>   [ ... ]
>   (XEN) CPU0 FATAL TRAP 14 (page fault), ERROR_CODE 0002, IN
> INTERRUPT CONTEXT. 
> 
> ff105b48 is _not_ the start address of some instruction, it's
> somewhere inbetween:
> 
>   ff105b45:       f0 0f ab 02             lock bts %eax,(%edx)
>   ff105b49:       19 c0                   sbb    %eax,%eax
> 
> Without "debug=y" xen boots just fine.  This is x86_32.
> 

I also see "debuy=y" xen failing on x86-64. It used to be working for a
while. I suspect recent changes broke it.

Jun

>   Gerd


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