Hi Roger, thanks for your time, your remark that you cannot see how it has to do with the shared_info got me to step-by-step revert all changes I have done. Turns out a few weeks ago when implementing a sysctl I must have accidentally deleted the architecture specific syctl in the default case of the common sysctl. This leads to Xen quietly defaulting to a x86_32 CPU.
Jan. CONFIDENTIALITY: The contents of this e-mail are confidential and intended only for the above addressee(s). If you are not the intended recipient, or the person responsible for delivering it to the intended recipient, copying or delivering it to anyone else or using it in any unauthorized manner is prohibited and may be unlawful. If you receive this e-mail by mistake, please notify the sender and the systems administrator at straym...@tttech.com immediately.