Re: [Xen-devel] Xen 4.0.0-rc7 problem/hang with vt-d DMAR parsing

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Tue, Mar 23, 2010 at 02:48:39PM +0000, Keir Fraser wrote:
> On 23/03/2010 14:40, "Pasi Kärkkäinen" <pasik@xxxxxx> wrote:
> 
> >> Just when I wrote that Xen 4.0.0-rc7 works fine for me.. :)
> >> Ok, so I went to BIOS and enabled VT-d. I haven't used VT-d earlier on this
> >> system.
> >> 
> > 
> > I just tried Xen 4.0.0-rc6-pre, and it has the same problem,
> > it is flooding the same messages and takes forever to boot.
> > 
> > So 4.0.0-rc7 actually works better, since it surpresses
> > the messages as a default so it takes "only" 30 secs to parse
> > the DMAR tables.
> 
> Do you have the latest BIOS version installed? What motherboard do you have?
>

I actually already had this information in the first mail :)
here it is again: Supermicro X7SB4 motherboard with BIOS version 1.2a (the 
latest available).

> It's not impossible that the BIOS VT-d support is just broken (I assume
> you've never tested VT-d on this particular type of system before).
>

Yeah, I've never used VT-d on this system earlier, so it could just be broken 
BIOS.
I guess Xen still shouldn't hang on it? 

-- Pasi
 

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