/etc/xen/xl.conf - XL Global/Host Configuration
The xl.conf file allows configuration of hostwide xl toolstack options.
For details of per-domain configuration options please see xl.cfg(5).
The config file consists of a series of KEY=VALUE pairs.
A value VALUE is one of:
A string, surrounded by either single or double quotes.
A number, in either decimal, octal (using a 0 prefix) or hexadecimal (using an 0x prefix).
A NUMBER interpreted as False (0) or True (any other value).
A list of VALUES of the above types. Lists are homogeneous and are not nested.
The semantics of each KEY defines which form of VALUE is required.
If disabled then xl will not attempt to reduce the amount of memory assigned to domain 0 in order to create free memory when starting a new domain. You are strongly recommended to set this to 0 (False) if you use the dom0_mem hypervisor command line to reduce the amount of memory given to domain 0 by default.
Default: 1
If disabled hotplug scripts will be called from udev, as it used to be in the previous releases. With the default option, hotplug scripts will be launched by xl directly.
Default: 1
Sets the path to the lock file used by xl to serialise certain operations (primarily domain creation).
Default: /var/lock/xl
Configures the default hotplug script used by virtual network devices.
Default: /etc/xen/scripts/vif-bridge
Configures the default bridge to set for virtual network devices.
Default: xenbr0
Configures the default output format used by xl when printing "machine readable" information. The default is to use the JSON http://www.json.org/ syntax. However for compatibility with the previous xm toolstack this can be configured to use the old SXP (S-Expression-like) syntax instead.
Default: json
Configures the name of the first block device to be used for temporary block device allocations by the toolstack. The default choice is "xvda".