This page contains problems that may be encountered when using Xen, and their solutions.
If you encounter problems you don't see solutions for on this page, navigate to the Xilinx Developer Forums for additional help.
Kernel call traces
When running Linux on top of Dom0, Linux can go in kernel panic due to insufficient memory for dom0. Example:
[ 12.747244] dump_backtrace+0x0/0x190 [ 12.747750] show_stack+0x18/0x30 [ 12.748176] dump_stack+0xd4/0x110 [ 12.748530] dump_header+0x48/0x1e8 [ 12.748902] out_of_memory+0x2c4/0x310 [ 12.749289] __alloc_pages_nodemask+0x72c/0xc64
Solution
Increase the dom0 allocated memory. Check xen_boot_tftp.source or xen_boot_sd.source relevant file and see “dom0_mem=1G”, increase this memory appropriately to > 1G. Save the file and recreate the xen_boot_tftp.scr using below command:
mkimage -A arm64 -T script -C none -a 0xC00000 -e 0xC00000 -d xen_boot_tftp.source xen_boot_tftp.scr
Reboot the machine with latest scripts.
Xen ethernet passthrough failures
When creating a new DomU using example-passnet.cfg file. If DomU create fails like below example:
xl create -c xl create -c /etc/xen/example-passnet.cfg ERROR: Parsing config from /etc/xen/example-passnet.cfg (XEN) memory_map:fail: dom1 gfn=ff0e0 mfn=ff0e0 nr=1 ret:-38
Solution
Update the xen.dts file as per instruction from Starting Linux guests with Pass-through networking page and re-boot the machine(dom0) and then create DomUs.