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

To: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Xen 4.0.0-rc7 problem/hang with vt-d DMAR parsing
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Tue, 23 Mar 2010 21:37:48 +0200
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Weidong Han <weidong.han@xxxxxxxxx>
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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 
I guess Xen still shouldn't hang on it? 

-- Pasi

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