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Re: [Xen-devel] Latest xen-3.4-testing hangs on boot with iommu=1, on a

To: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Latest xen-3.4-testing hangs on boot with iommu=1, on a Lenovo T500
From: Tom Rotenberg <tom.rotenberg@xxxxxxxxx>
Date: Thu, 16 Jul 2009 12:54:53 +0300
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
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Just bisected the tree, and i found out, that it's not because of Xen,
since even 19607 (which worked for me last time) didn't work. I tried
to play a little bit with some of the BIOS settings, but it didn't
It looks like it's some kind of an hardware problem, which causes the
whole machine to freeze, when trying to work with the IOMMU. Any
suggestions on what to do next? to whom should i send this


On Thu, Jul 16, 2009 at 11:26 AM, Tom Rotenberg<tom.rotenberg@xxxxxxxxx> wrote:
> It didn't help.
> I will bisect the tree to find the problem.
> On Wed, Jul 15, 2009 at 8:11 PM, Keir Fraser<keir.fraser@xxxxxxxxxxxxx> wrote:
>> I'd say changesets 19625 and 19632 are most likely suspects. You could try
>> reverting those patches, or updating your tree to just before those
>> changesets, and see if that helps.
>>  -- Keir
>> On 15/07/2009 18:03, "Tom Rotenberg" <tom.rotenberg@xxxxxxxxx> wrote:
>>> The last version, i have tried and tested (and it worked), was:
>>> changeset 19607: 1ac7832a2fcd
>>> author: Keir Fraser <keir.fraser@xxxxxxxxxx>
>>> date: Mon May 18 13:54:48 2009 +0100
>>> files: README
>>> On Wed, Jul 15, 2009 at 7:58 PM, Keir Fraser<keir.fraser@xxxxxxxxxxxxx> 
>>> wrote:
>>>> On 15/07/2009 17:01, "Tom Rotenberg" <tom.rotenberg@xxxxxxxxx> wrote:
>>>>> I have cloned the latest xen 3,4 testing tree, changeset 19696:
>>>>>         22ef8e900a6d (i386: fix handling of Xen entries in final L2 page
>>>>> table), and i have installed it on a Lenovo T500 machine, with VT-d
>>>>> enabled.
>>>> When did it last work with the 3.4 tree?
>>>>  -- Keir

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