Merge with /pub/scm/linux/kernel/git/torvalds/linux-2.6.git

[pandora-kernel.git] / mm / Kconfig

diff --git a/mm/Kconfig b/mm/Kconfig
index 4e9937a..21eb51d 100644 (file)
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -29,7 +29,7 @@ config FLATMEM_MANUAL
          If unsure, choose this option (Flat Memory) over any other.
 
 config DISCONTIGMEM_MANUAL
-       bool "Discontigious Memory"
+       bool "Discontiguous Memory"
        depends on ARCH_DISCONTIGMEM_ENABLE
        help
          This option provides enhanced support for discontiguous
@@ -52,7 +52,7 @@ config SPARSEMEM_MANUAL
          memory hotplug systems.  This is normal.
 
          For many other systems, this will be an alternative to
-         "Discontigious Memory".  This option provides some potential
+         "Discontiguous Memory".  This option provides some potential
          performance benefits, along with decreased code complexity,
          but it is newer, and more experimental.
 
@@ -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"