With sparsemem and memory hotplug there are quite a few options that
we kept adding identically in several different architectures. This
new file allows some of these to be consolidated.
Signed-off-by: Andy Whitcroft <[email protected]>
Signed-off-by: Dave Hansen <[email protected]>
---
memhotplug-dave/mm/Kconfig | 41 +++++++++++++++++++++++++++++++++++++++++
1 files changed, 41 insertions(+)
diff -puN mm/Kconfig~A6-mm-Kconfig mm/Kconfig
--- memhotplug/mm/Kconfig~A6-mm-Kconfig 2005-03-25 08:08:22.000000000 -0800
+++ memhotplug-dave/mm/Kconfig 2005-03-25 08:08:22.000000000 -0800
@@ -0,0 +1,41 @@
+choice
+ prompt "Memory model"
+ default FLATMEM
+ default SPARSEMEM if ARCH_SPARSEMEM_DEFAULT
+ default DISCONTIGMEM if ARCH_DISCONTIGMEM_DEFAULT
+
+config FLATMEM
+ bool "Flat Memory"
+ depends on !ARCH_DISCONTIGMEM_ENABLE || ARCH_FLATMEM_ENABLE
+ help
+ This option allows you to change some of the ways that
+ Linux manages its memory internally. Most users will
+ only have one option here: FLATMEM. This is normal
+ and a correct option.
+
+ Some users of more advanced features like NUMA and
+ memory hotplug may have different options here.
+ DISCONTIGMEM is an more mature, better tested system,
+ but is incompatible with memory hotplug and may suffer
+ decreased performance over SPARSEMEM. If unsure between
+ "Sparse Memory" and "Discontiguous Memory", choose
+ "Discontiguous Memory".
+
+ If unsure, choose FLATMEM.
+
+config DISCONTIGMEM
+ bool "Discontigious Memory"
+ depends on ARCH_DISCONTIGMEM_ENABLE
+ help
+ If unsure, choose this option over "Sparse Memory".
+
+endchoice
+
+#
+# Both the NUMA code and DISCONTIGMEM use arrays of pg_data_t's
+# to represent different areas of memory. This variable allows
+# those dependencies to exist individually.
+#
+config NEED_MULTIPLE_NODES
+ def_bool y
+ depends on DISCONTIGMEM || NUMA
_
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