Re: [Xen-devel] xen 2.0/2.0.1 reboots silently on via C3-cpu

[Rupert Schlick <rupert.schlick@xxxxxxx>]

Am Sam, den 04.12.2004 schrieb Adam Sulmicki um 1:24:
> On Fri, 3 Dec 2004, Ronald G. Minnich wrote:
> 
> >> On my lex mainboard with a Via C3 cpu, xen 2.0(.1) reboots (nearly)
> >> immediately without any outputs.
> >
> > Adam Sulmicki has been working this problem. Take a look at the logs if
> > there are any to see what he is doing.
> >
> > It is a C3 limitation coupled with Xen's dependence on 4M page tables,
> > among other things.
> 
> that is probably correct but .. just for sake of completeness.. which 
> exactly C3 cpu is this ? Pasting /proc/cpuinfo would give good 
> information.

cpuinfo of the rebooting machine:

processor       : 0
vendor_id       : CentaurHauls
cpu family      : 6
model           : 7
model name      : VIA Samuel 2
stepping        : 3
cpu MHz         : 531.930
cache size      : 64 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu de tsc msr cx8 mtrr pge mmx 3dnow
bogomips        : 1044.48

Maybe of some use too, cpuinfo of the _working_ machine:

processor       : 0
vendor_id       : CentaurHauls
cpu family      : 6
model           : 9
model name      : VIA Nehemiah
stepping        : 5
cpu MHz         : 999.858
cache size      : 64 KB
fdiv_bug        : no
hlt_bug         : yes
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu tsc msr cx8 cmov mmx sse rng rng_en
bogomips        : 1992.29

> I also expect to send updated patch to the list on Monday which should 
> address all know in issues. FWIW, the issues I ran so far and fixed were:
> 
>       1) lack of 4mb page tables
>       2) lack of support for CMOVE
> 
So there is hope, at least. :-)
 
Rupert



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