Unable to install a new DomU and on boot automatic start of DomU is delayed

This document (7010688) is provided subject to the disclaimer at the end of this document.


SUSE Linux Enterprise Server 11 Service Pack 1
SUSE Linux Enterprise Server 11 Service Pack 2


Update to xen-4.1.2_18-0.9.1 or later has been applied.

DomU's that should start on boot, are starting delayed (60 seconds).

It is not possible to create a new DomU with vm-install or using YaST(2).

When creating a new DomU the following is found in the /var/log/xen/xend.log:
[2012-08-21 16:16:33 11373] ERROR (XendDomainInfo:2624) (12, 'Cannot allocate

The following 130nm and 90nm (DDR1-only) AMD processors are subject of this problem:
  • First-generation AMD-Opteron(tm) single and dual core processors in either 939 or 940 packages:
    • AMD Opteron(tm) 100-Series Processors
    • AMD Opteron(tm) 200-Series Processors
    • AMD Opteron(tm) 800-Series Processors
  • AMD Athlon(tm) processors in either 754, 939 or 940 packages
  • AMD Sempron(tm) processor in either 754 or 939 packages
  • AMD Turion(tm) Mobile Technology in 754 package


Xen will not allow creation of DomU-s on this CPU for security reasons. Pass "allow_unsafe" as boot option to Dom0, when all the guest kernels are trusted or when creating new DomU's.

The automatic start from DomU's during boot is not prevented, but delayed for 60 seconds. Manually started DomU's are not affected by this update.


For more information see:


This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:7010688
  • Creation Date: 27-Aug-2012
  • Modified Date:04-Oct-2022
    • SUSE Linux Enterprise Server

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