# eventually, we can have this option just 'select SPARSEMEM'
config MEMORY_HOTPLUG
bool "Allow for memory hot-add"
- depends on SPARSEMEM && HOTPLUG && !SOFTWARE_SUSPEND
+ depends on SPARSEMEM || X86_64_ACPI_NUMA
+ depends on HOTPLUG && !SOFTWARE_SUSPEND && ARCH_ENABLE_MEMORY_HOTPLUG
+ depends on (IA64 || X86 || PPC64)
comment "Memory hotplug is currently incompatible with Software Suspend"
depends on SPARSEMEM && HOTPLUG && SOFTWARE_SUSPEND
+config MEMORY_HOTPLUG_SPARSE
+ def_bool y
+ depends on SPARSEMEM && MEMORY_HOTPLUG
+
# Heavily threaded applications may benefit from splitting the mm-wide
# page_table_lock, so that faults on different parts of the user address
# space can be handled with less contention: split it at this NR_CPUS.
# support for page migration
#
config MIGRATION
- def_bool y if NUMA || SPARSEMEM || DISCONTIGMEM
- depends on SWAP
+ bool "Page migration"
+ def_bool y
+ depends on NUMA
+ help
+ Allows the migration of the physical location of pages of processes
+ while the virtual addresses are not changed. This is useful for
+ example on NUMA systems to put pages nearer to the processors accessing
+ the page.
+
+config RESOURCES_64BIT
+ bool "64 bit Memory and IO resources (EXPERIMENTAL)" if (!64BIT && EXPERIMENTAL)
+ default 64BIT
+ help
+ This option allows memory and IO resources to be 64 bit.