| =============== |
| /proc/sys/xen/ |
| =============== |
| |
| Copyright (c) 2026, Shubham Chakraborty <chakrabortyshubham66@gmail.com> |
| |
| For general info and legal blurb, please look in |
| Documentation/admin-guide/sysctl/index.rst. |
| |
| ------------------------------------------------------------------------------ |
| |
| These files show up in ``/proc/sys/xen/``, depending on the |
| kernel configuration: |
| |
| .. contents:: :local: |
| |
| balloon/hotplug_unpopulated |
| =========================== |
| |
| This flag controls whether unpopulated memory ranges are automatically |
| hotplugged as system RAM. |
| |
| - ``0``: Unpopulated ranges are not hotplugged (default). |
| - ``1``: Unpopulated ranges are automatically hotplugged. |
| |
| When enabled, the Xen balloon driver will add memory regions that are |
| marked as unpopulated in the Xen memory map to the system as usable RAM. |
| This allows for dynamic memory expansion in Xen guest domains. |
| |
| This option is only available when the kernel is built with |
| ``CONFIG_XEN_BALLOON_MEMORY_HOTPLUG`` enabled. |
