X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=mm%2FKconfig;h=c5aa26b14ed841af6850b9271056246dbe272e14;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=0873998d14961dda4d720de85d00c611fd2f0387;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git

diff --git a/mm/Kconfig b/mm/Kconfig
index 0873998d1..c5aa26b14 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -92,7 +92,7 @@ config HAVE_MEMORY_PRESENT
 
 #
 # SPARSEMEM_EXTREME (which is the default) does some bootmem
-# allocations when memory_present() is called.  If this can not
+# allocations when memory_present() is called.  If this cannot
 # be done on your architecture, select this option.  However,
 # statically allocating the mem_section[] array can potentially
 # consume vast quantities of .bss, so be careful.
@@ -104,7 +104,7 @@ config SPARSEMEM_STATIC
 	def_bool n
 
 #
-# Architectecture platforms which require a two level mem_section in SPARSEMEM
+# Architecture platforms which require a two level mem_section in SPARSEMEM
 # must select this option. This is usually for architecture platforms with
 # an extremely sparse physical address space.
 #
@@ -115,27 +115,48 @@ config SPARSEMEM_EXTREME
 # eventually, we can have this option just 'select SPARSEMEM'
 config MEMORY_HOTPLUG
 	bool "Allow for memory hot-add"
-	depends on SPARSEMEM && HOTPLUG && !SOFTWARE_SUSPEND && ARCH_ENABLE_MEMORY_HOTPLUG
+	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.
 # Default to 4 for wider testing, though 8 might be more appropriate.
 # ARM's adjust_pte (unused if VIPT) depends on mm-wide page_table_lock.
 # PA-RISC 7xxx's spinlock_t would enlarge struct page from 32 to 44 bytes.
+# XEN on x86 architecture uses the mapping field on pagetable pages to store a
+# pointer to the destructor. This conflicts with pte_lock_deinit().
 #
 config SPLIT_PTLOCK_CPUS
 	int
 	default "4096" if ARM && !CPU_CACHE_VIPT
 	default "4096" if PARISC && !PA20
+	default "4096" if X86_XEN || X86_64_XEN
 	default "4"
 
 #
 # 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.