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

To: Pasi Kärkkäinen <pasik@xxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Xen 4.0.0-rc7 problem/hang with vt-d DMAR parsing
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Tue, 23 Mar 2010 14:48:39 +0000
Cc: Weidong Han <weidong.han@xxxxxxxxx>
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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?
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).

 -- Keir

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