[PATCH] unpaged: get_user_pages VM_RESERVED

[powerpc.git] / mm / Kconfig

diff --git a/mm/Kconfig b/mm/Kconfig
index f35a550..ae9ce6b 100644 (file)
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -112,15 +112,25 @@ 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.
+# ARM26 and SPARC32 and PPC64 may use one page for multiple page tables.
 #
 config SPLIT_PTLOCK_CPUS
        int
        default "4096" if ARM && !CPU_CACHE_VIPT
        default "4096" if PARISC && DEBUG_SPINLOCK && !64BIT
+       default "4096" if ARM26 || SPARC32 || PPC64
        default "4"