Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux...

[safe/jmp/linux-2.6] / mm / Kconfig

diff --git a/mm/Kconfig b/mm/Kconfig
index ea2d8b6..44cf6f0 100644 (file)
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -67,7 +67,7 @@ config DISCONTIGMEM
 
 config SPARSEMEM
        def_bool y
-       depends on SPARSEMEM_MANUAL
+       depends on (!SELECT_MEMORY_MODEL && ARCH_SPARSEMEM_ENABLE) || SPARSEMEM_MANUAL
 
 config FLATMEM
        def_bool y
@@ -128,11 +128,8 @@ config SPARSEMEM_VMEMMAP
 config MEMORY_HOTPLUG
        bool "Allow for memory hot-add"
        depends on SPARSEMEM || X86_64_ACPI_NUMA
-       depends on HOTPLUG && !(HIBERNATION && !S390) && ARCH_ENABLE_MEMORY_HOTPLUG
-       depends on (IA64 || X86 || PPC64 || SUPERH || S390)
-
-comment "Memory hotplug is currently incompatible with Software Suspend"
-       depends on SPARSEMEM && HOTPLUG && HIBERNATION && !S390
+       depends on HOTPLUG && ARCH_ENABLE_MEMORY_HOTPLUG
+       depends on (IA64 || X86 || PPC_BOOK3S_64 || SUPERH || S390)
 
 config MEMORY_HOTPLUG_SPARSE
        def_bool y
@@ -214,6 +211,20 @@ config HAVE_MLOCKED_PAGE_BIT
 config MMU_NOTIFIER
        bool
 
+config KSM
+       bool "Enable KSM for page merging"
+       depends on MMU
+       help
+         Enable Kernel Samepage Merging: KSM periodically scans those areas
+         of an application's address space that an app has advised may be
+         mergeable.  When it finds pages of identical content, it replaces
+         the many instances by a single resident page with that content, so
+         saving memory until one or another app needs to modify the content.
+         Recommended for use with KVM, or with other duplicative applications.
+         See Documentation/vm/ksm.txt for more information: KSM is inactive
+         until a program has madvised that an area is MADV_MERGEABLE, and
+         root has set /sys/kernel/mm/ksm/run to 1 (if CONFIG_SYSFS is set).
+
 config DEFAULT_MMAP_MIN_ADDR
         int "Low address space to protect from user allocation"
         default 4096
@@ -232,10 +243,12 @@ config DEFAULT_MMAP_MIN_ADDR
          This value can be changed after boot using the
          /proc/sys/vm/mmap_min_addr tunable.
 
+config ARCH_SUPPORTS_MEMORY_FAILURE
+       bool
 
 config MEMORY_FAILURE
        depends on MMU
-       depends on X86_MCE
+       depends on ARCH_SUPPORTS_MEMORY_FAILURE
        bool "Enable recovery from hardware memory errors"
        help
          Enables code to recover from some memory failures on systems
@@ -243,6 +256,10 @@ config MEMORY_FAILURE
          even when some of its memory has uncorrected errors. This requires
          special hardware support and typically ECC memory.
 
+config HWPOISON_INJECT
+       tristate "Poison pages injector"
+       depends on MEMORY_FAILURE && DEBUG_KERNEL
+
 config NOMMU_INITIAL_TRIM_EXCESS
        int "Turn on mmap() excess space trimming before booting"
        depends on !MMU