vmscan: kswapd: don't retry balance_pgdat() if all zones are unreclaimable

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

diff --git a/mm/Kconfig b/mm/Kconfig
index fe5f674..17b8947 100644 (file)
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -67,7 +67,7 @@ config DISCONTIGMEM
 
 config SPARSEMEM
        def_bool y
 
 config SPARSEMEM
        def_bool y

-       depends on SPARSEMEM_MANUAL
+       depends on (!SELECT_MEMORY_MODEL && ARCH_SPARSEMEM_ENABLE) || SPARSEMEM_MANUAL

 
 config FLATMEM
        def_bool y
 
 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
 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
 
 config MEMORY_HOTPLUG_SPARSE
        def_bool y


@@ -153,7 +150,7 @@ config MEMORY_HOTREMOVE
 #
 config PAGEFLAGS_EXTENDED
        def_bool y
 #
 config PAGEFLAGS_EXTENDED
        def_bool y

-       depends on 64BIT || SPARSEMEM_VMEMMAP || !NUMA || !SPARSEMEM
+       depends on 64BIT || SPARSEMEM_VMEMMAP || !SPARSEMEM

 
 # Heavily threaded applications may benefit from splitting the mm-wide
 # page_table_lock, so that faults on different parts of the user address
 
 # Heavily threaded applications may benefit from splitting the mm-wide
 # page_table_lock, so that faults on different parts of the user address


@@ -161,11 +158,13 @@ config PAGEFLAGS_EXTENDED
 # 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.
 # 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.

+# DEBUG_SPINLOCK and DEBUG_LOCK_ALLOC spinlock_t also enlarge struct page.

 #
 config SPLIT_PTLOCK_CPUS
        int
 #
 config SPLIT_PTLOCK_CPUS
        int

-       default "4096" if ARM && !CPU_CACHE_VIPT
-       default "4096" if PARISC && !PA20
+       default "999999" if ARM && !CPU_CACHE_VIPT
+       default "999999" if PARISC && !PA20
+       default "999999" if DEBUG_SPINLOCK || DEBUG_LOCK_ALLOC

        default "4"
 
 #
        default "4"
 
 #


@@ -203,19 +202,26 @@ config VIRT_TO_BUS
        def_bool y
        depends on !ARCH_NO_VIRT_TO_BUS
 
        def_bool y
        depends on !ARCH_NO_VIRT_TO_BUS
 

-config HAVE_MLOCK
-       bool
-       default y if MMU=y
-
-config HAVE_MLOCKED_PAGE_BIT
-       bool
-       default y if HAVE_MLOCK=y
-

 config MMU_NOTIFIER
        bool
 
 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 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"
 config DEFAULT_MMAP_MIN_ADDR
         int "Low address space to protect from user allocation"

+       depends on MMU

         default 4096
         help
          This is the portion of low virtual memory which should be protected
         default 4096
         help
          This is the portion of low virtual memory which should be protected


@@ -232,6 +238,23 @@ config DEFAULT_MMAP_MIN_ADDR
          This value can be changed after boot using the
          /proc/sys/vm/mmap_min_addr tunable.
 
          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 ARCH_SUPPORTS_MEMORY_FAILURE
+       bool "Enable recovery from hardware memory errors"
+       help
+         Enables code to recover from some memory failures on systems
+         with MCA recovery. This allows a system to continue running
+         even when some of its memory has uncorrected errors. This requires
+         special hardware support and typically ECC memory.
+
+config HWPOISON_INJECT
+       tristate "HWPoison pages injector"
+       depends on MEMORY_FAILURE && DEBUG_KERNEL && PROC_FS
+       select PROC_PAGE_MONITOR

 
 config NOMMU_INITIAL_TRIM_EXCESS
        int "Turn on mmap() excess space trimming before booting"
 
 config NOMMU_INITIAL_TRIM_EXCESS
        int "Turn on mmap() excess space trimming before booting"