X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=mm%2FKconfig;h=a9cb80ae6409df599cc3823a7a072a158c41112c;hb=c84db23c6e587d3ab00a41c51fedf758e1f6ecd4;hp=f35a550ba4b92f9749fee63d57e1f5708adc1dc6;hpb=4c21e2f2441dc5fbb957b030333f5a3f2d02dea7;p=linux-2.6

diff --git a/mm/Kconfig b/mm/Kconfig
index f35a550ba4..a9cb80ae64 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -11,7 +11,7 @@ choice
 
 config FLATMEM_MANUAL
 	bool "Flat Memory"
-	depends on !ARCH_DISCONTIGMEM_ENABLE || ARCH_FLATMEM_ENABLE
+	depends on !(ARCH_DISCONTIGMEM_ENABLE || ARCH_SPARSEMEM_ENABLE) || ARCH_FLATMEM_ENABLE
 	help
 	  This option allows you to change some of the ways that
 	  Linux manages its memory internally.  Most users will
@@ -112,15 +112,30 @@ config SPARSEMEM_EXTREME
 	def_bool y
 	depends on SPARSEMEM && !SPARSEMEM_STATIC
 
+# eventually, we can have this option just 'select SPARSEMEM'
+config MEMORY_HOTPLUG
+	bool "Allow for memory hot-add"
+	depends on SPARSEMEM && HOTPLUG && !SOFTWARE_SUSPEND
+
+comment "Memory hotplug is currently incompatible with Software Suspend"
+	depends on SPARSEMEM && HOTPLUG && SOFTWARE_SUSPEND
+
 # 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's debug spinlock_t is too large for the 32-bit struct page.
+# PA-RISC 7xxx's spinlock_t would enlarge struct page from 32 to 44 bytes.
 #
 config SPLIT_PTLOCK_CPUS
 	int
 	default "4096" if ARM && !CPU_CACHE_VIPT
-	default "4096" if PARISC && DEBUG_SPINLOCK && !64BIT
+	default "4096" if PARISC && !PA20
 	default "4"
+
+#
+# support for page migration
+#
+config MIGRATION
+	def_bool y if NUMA || SPARSEMEM || DISCONTIGMEM
+	depends on SWAP