Re: [Xen-users] Best way to view pre-kernel output from printk's in Xen hypervisor

[Juergen Gross <jgross@xxxxxxxx>]

On 23/09/16 17:24, Brett Stahlman wrote:
> I'm looking for output from Xen hypervisor itself (e.g., function
> __start_xen), prior to its loading dom0. I tried adding loglvl=all to
> my grub boot stanza like so:
> 
> multiboot /boot/xen.gz placeholder  ${xen_rm_opts} loglvl=all guest_loglvl=all
> 
> module /boot/vmlinuz-4.4.0-36-generic placeholder
> root=UUID=43b71f62-6154-482f-bf81-925abedd4eae ro single loglvl=all
> 
> ...but I don't see any print output prior to kernel load in either
> /var/log/xen/* or dmesg output. I'm wanting to capture the printk's in
> __start_xen in a file, without having to hook up a serial cable...

"xl dmesg" should do the trick.

Juergen


_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxx
https://lists.xen.org/xen-users