-config XEN_MAX_DOMAIN_MEMORY
- int
- default 500 if X86_64
- default 64 if X86_32
- depends on XEN
- help
- This only affects the sizing of some bss arrays, the unused
- portions of which are freed.
+config XEN_512GB
+ bool "Limit Xen pv-domain memory to 512GB"
+ depends on XEN && X86_64
+ default y
+ help
+ Limit paravirtualized user domains to 512GB of RAM.
+
+ The Xen tools and crash dump analysis tools might not support
+ pv-domains with more than 512 GB of RAM. This option controls the
+ default setting of the kernel to use only up to 512 GB or more.
+ It is always possible to change the default via specifying the
+ boot parameter "xen_512gb_limit".