Re: [Xen-devel] Help with the migration to XEN-4.1 please

[Flavio <fbcyborg@xxxxxxxxx>]

Hello,

Here again with a similar problem, when the xen_gntdev module is loaded:
Parsing config file /mnt/dati/xen/vmstore/gentoo-10.0/gentoo-10.0.x86-64.cfg
xenconsole: Could not read tty from store: No such file or directory
libxl: error: libxl_device.c:476:libxl__wait_for_device_model Device
Model not ready
xl: fatal error: libxl_create.c:535, rc=-1: libxl__confirm_device_model_startup

I don't know what happened but I've got that error starting the two linux domU
guest I have on my disk.

What has happened?

Flavio

On 14 September 2011 16:16, Flavio <fbcyborg@xxxxxxxxx> wrote:
> On 14 September 2011 16:09, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
>> On Wed, 2011-09-14 at 10:05 -0400, Flavio wrote:
>>
>>> xen be core: xen be core: can't open gnttab device
>>> can't open gnttab device
>>
>> This is probably the issue. You need /dev/xen/gntdev, I think you need
>> to enable CONFIG_XEN_GNTDEV.
> YESSSSSSSSSSSSS!
> Actually it was compiled as module but it wasn't running.
> Also the xen-gntalloc module is present but it is not running.
> Now, simply modprobing the xen-gntdev module, the vm has started, and
> the console is available!
> Only one problem now: the guest machine doesn't get any IP when dhcp runs.
>
>>
>>> > The file:/mnt/data/xen/vmstore/gentoo-10.0/gentoo-10.0.x86-64.img (and
>>> > the other one) is interesting.
>>> As you see I use loop files for the root filesystems.
>>
>> That's the thing -- you aren't, you are using img files.
> It was my mistake! I thought they were loop files too.
>
>> Under xend
>> these would be setup as loop devices for you but under xl you insteasd
>> get a userspace block backend (tap if it is available, qdisk from
>> qemu-d, if not).
> OK, now I understand.
>
> THANK YOU SO MUCH Ian.

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