X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=mm%2FKconfig;h=b0673066841223074db7e14c50b5a03db2de02a9;hb=29c71111d0557385328211b130246a90f9223b46;hp=a7609cbcb00d8ce3fb81f366d7c835af970452e7;hpb=ecaedfa385a6df297e17d6e9f296cc63f12c053f;p=linux-2.6-omap-h63xx.git

diff --git a/mm/Kconfig b/mm/Kconfig
index a7609cbcb00..b0673066841 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -112,6 +112,19 @@ config SPARSEMEM_EXTREME
 	def_bool y
 	depends on SPARSEMEM && !SPARSEMEM_STATIC
 
+#
+# SPARSEMEM_VMEMMAP uses a virtually mapped mem_map to optimise pfn_to_page
+# and page_to_pfn.  The most efficient option where kernel virtual space is
+# not under pressure.
+#
+config SPARSEMEM_VMEMMAP_ENABLE
+	def_bool n
+
+config SPARSEMEM_VMEMMAP
+	bool
+	depends on SPARSEMEM
+	default y if (SPARSEMEM_VMEMMAP_ENABLE)
+
 # eventually, we can have this option just 'select SPARSEMEM'
 config MEMORY_HOTPLUG
 	bool "Allow for memory hot-add"