Re: [Xen-devel] I only see one CPU core on Xen when booted via grub

["msd+xen-devel@xxxxxx" <msd+xen-devel@xxxxxx>]

Hi,

I think there is something linked with ACPI failing when there is only 
one core detected.
> You should provide the output of `xl dmesg` from Xen

I attached some files, tell me if it's ok for you.

> And ideally boot with an hypervisor that's been built with debug support.

Do you know if there is a package in Debian 9 for that ? And how can I 
activate it ?

Guillaume

Le 22/01/2018 à 18:45, Roger Pau Monné a écrit :
> On Mon, Jan 22, 2018 at 06:28:17PM +0100, msd+xen-devel@xxxxxx wrote:
> > Hi,
> >
> > I only see 1 CPU core on Xen 4.9 when booted via grub instead of 8.
> >
> > It's may be related to :
> > - https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=820807
> > - https://xenproject.atlassian.net/browse/XEN-42
> >
> > It is the first server on which I have this problem.
> >
> > I can confirm that :
> > - if I boot Debian througt grub, I see the 8 cores
> > - if I boot Xen through grub, I only see _one_ core
> > - if I boot Xen directly through EFI (using `efibootmgr`), I see the 8 cores
> >
> > 1. Do you know what happens ?
> > 2. Do you need some logs ?
> You should provide the output of `xl dmesg` from Xen. And ideally boot
> with an hypervisor that's been built with debug support. dmesg from
> Linux might also be interesting (both when booted as Dom0 and bare
> metal).
>
> Thanks, Roger.

Attachment: efi-grub-xen_dmesg_1-core.txt
Description: Text document

Attachment: efi-grub-xen_xl-dmesg_1-core.txt
Description: Text document

Attachment: efi-xen_dmesg_8-cores.txt
Description: Text document

Attachment: efi-xen_xl-dmesg_8-cores.txt
Description: Text document

Attachment: efi-debian_dmesg_8-cores.txt
Description: Text document

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