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Re: [Xen-users] xen on debian - boot problems


  • To: Christian Widu Wittekindt <christian.wittekindt@xxxxxxxxxxxxxxxxxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxxx
  • From: Hans van Kranenburg <hans@xxxxxxxxxxx>
  • Date: Sat, 17 Aug 2019 12:14:16 +0200
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  • Delivery-date: Sat, 17 Aug 2019 10:15:43 +0000
  • List-id: Xen user discussion <xen-users.lists.xenproject.org>
  • Openpgp: preference=signencrypt

Hi Widu,

On 8/12/19 3:37 PM, Christian Widu Wittekindt wrote:
> 
> I've got xen installed on debian. And everything is just fine as long as
> I boot an (old) 3.16 kernel as dom0.
> 
> When I try to boot a kernel 4.11, 4.19 or 5.2 (dom0) under xen
> hypervisor booting falls back to busybox with the message:
> 
>     Gave up waitng for root file system device

I have one piece of "been there done that" experience that I can think
of: sometimes a raid controller can take a few seconds to initialize and
present the disks to the OS after powering up. I had to use rootdelay=10
in this case. But, I would suspect that in this case you would see the
same failure when booting without Xen. So, just a random thought.

> When I boot just debian without xen there's no problem at all with any
> of these kernel versions.
> 
> And of course I already searched the web and I found that a lot of
> people experience problem with xen in combination with an adaptec raid
> controller.

And what kind of problems are those?

> And as I'm using an Adaptec 8405 controller, I suspected it
> to be the bad guy. But: there does not seem to be a problem with aacraid
> kernel module. When I drop to busybox (trying to boot with xen
> hypervisor) and have a loot at the modules I get
> 
> # lsmod | grep aacraid
> aacraid                87960  1
> scsi_mod              195357  3 aacraid,libata,sr_mod
> 
> When I boot with xen and kernel 3.16 (which works) I get:
> 
> # lsmod | grep aacraid
> aacraid                87960  4
> scsi_mod              195357  5 sg,aacraid,libata,sd_mod,sr_mod
> 
> So at least there's no problem in loading the aacraid module. Any Ideas?

Yes, post full dmesg output of both starting with and without Xen.

Hans

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