diff options
Diffstat (limited to 'mm/Kconfig')
| -rw-r--r-- | mm/Kconfig | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index e24d348083c..b1f03b0eb7f 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -112,6 +112,19 @@ config SPARSEMEM_EXTREME def_bool y depends on SPARSEMEM && !SPARSEMEM_STATIC +# +# SPARSEMEM_VMEMMAP uses a virtually mapped mem_map to optimise pfn_to_page +# and page_to_pfn. The most efficient option where kernel virtual space is +# not under pressure. +# +config SPARSEMEM_VMEMMAP_ENABLE + def_bool n + +config SPARSEMEM_VMEMMAP + bool + depends on SPARSEMEM + default y if (SPARSEMEM_VMEMMAP_ENABLE) + # eventually, we can have this option just 'select SPARSEMEM' config MEMORY_HOTPLUG bool "Allow for memory hot-add" @@ -126,6 +139,11 @@ config MEMORY_HOTPLUG_SPARSE def_bool y depends on SPARSEMEM && MEMORY_HOTPLUG +config MEMORY_HOTREMOVE + bool "Allow for memory hot remove" + depends on MEMORY_HOTPLUG && ARCH_ENABLE_MEMORY_HOTREMOVE + depends on MIGRATION + # 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. |