Novell LINUX ENTERPRISE 11 SP1 - LINUX AUDIT, Manual, Page: 38 / 140

3.7 Troubleshooting
In some circumstances, problems may occur during the installation of the VM Guest.
This section describes some known problems and their solutions.
During boot, the system hangs
The software I/O translation buffer allocates a large chunk of low memory early
in the bootstrap process. If the requests for memory exceed the size of the buffer
it usually results in a hung boot process. To check if this is the case, switch to
console 10 and check the output there for a message similar to
kernel: PCI-DMA: Out of SW-IOMMU space for 32768 bytes at device
000:01:02.0
In this case you need to increase the size of the
swiotlb
. Enter “swiotlb=128”
on the Domain0 command line. Note that the number can be adjusted up or down
to find the optimal size for the machine.
28 Virtualization with Xen