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

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

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.

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