Merge git://oak/home/sfr/kernels/iseries/work

[powerpc.git] / mm / Kconfig

diff --git a/mm/Kconfig b/mm/Kconfig
index 4e9937a..1a4473f 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
          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
        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
          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.
 
          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
 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.
+#
+config SPLIT_PTLOCK_CPUS
+       int
+       default "4096" if ARM && !CPU_CACHE_VIPT
+       default "4096" if PARISC && DEBUG_SPINLOCK && !64BIT
+       default "4"