libvirt users - Nov 2018 - Unable to configure libxl's memory management parameters

Hi !

I'm trying to get a working installation of Xen 4.11 from source, with
Libvirt.

I managed to compile, install and boot on Xen so far.
But when I start the libvirt daemon, it fails with the following error:

info : libvirt version: 4.1.0, package: 5.fc28 (Fedora Project,
2018-08-23-19:00:58, buildvm-19
error : libxlDriverConfigNew:1644 : Unable to configure libxl's memory
management parameters
error : virStateInitialize:775 : Initialization of LIBXL state driver failed: no
error
error : daemonRunStateInit:837 : Driver state initialization failed

So there are 2 things here:
- why libvirt is unable to configure Libxl ? where should i look for any clues ?
- "Initialization of LIBXL state driver failed: no error" it looks
like a bug in Libvirt, if it fails, an error message should be reported


Thank you.
--
Mathieu Tarral

Sent with ProtonMail Secure Email.

On 11/27/18 4:25 AM, Mathieu Tarral wrote:
> Hi !
> 
> I'm trying to get a working installation of Xen 4.11 from source, with
Libvirt.
> 
> I managed to compile, install and boot on Xen so far.
> But when I start the libvirt daemon, it fails with the following error:
> 
> info : libvirt version: 4.1.0, package: 5.fc28 (Fedora Project,
2018-08-23-19:00:58, buildvm-19
> error : libxlDriverConfigNew:1644 : Unable to configure libxl's memory
management parameters
> error : virStateInitialize:775 : Initialization of LIBXL state driver
failed: no error
> error : daemonRunStateInit:837 : Driver state initialization failed
> 
> So there are 2 things here:
> - why libvirt is unable to configure Libxl ? where should i look for any
clues ?
This generally means you are missing some xen services in dom0, e.g. xenstored, 
xen-init-dom0, etc. xencommons.service generally handles starting all of the 
necessary services. Did xencommons.service start successfully? Before attempting
to start libvirt you should ensure the xen tools are working properly. E.g. I 
suspect 'xl list' is not behaving well either.
> - "Initialization of LIBXL state driver failed: no error" it
looks like a bug in Libvirt, if it fails, an error message should be reported
Hmm, seems we report an error in libxlDriverConfigNew but never set it for use 
in virStateInitialize. I'll add this issue to my task list.

Regards,
Jim