X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=mm%2FKconfig;h=b3db11f137e006d937e5d16199ae4506a0771095;hb=c898ec16e83331abde39118e22e9e38335bbb950;hp=391ffc54d13675846cb61c5fc91a875914ac11a8;hpb=0d9136fdbcdbddcd4eb5ac94c248c039193d4795;p=powerpc.git

diff --git a/mm/Kconfig b/mm/Kconfig
index 391ffc54d1..b3db11f137 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
@@ -111,3 +111,24 @@ config SPARSEMEM_STATIC
 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 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 && !PA20
+	default "4"