From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from westrelay02.boulder.ibm.com (westrelay02.boulder.ibm.com [9.17.195.11]) by e34.co.us.ibm.com (8.12.10/8.12.9) with ESMTP id j2PLsjKN401334 for ; Fri, 25 Mar 2005 16:54:45 -0500 Received: from d03av02.boulder.ibm.com (d03av02.boulder.ibm.com [9.17.195.168]) by westrelay02.boulder.ibm.com (8.12.10/NCO/VER6.6) with ESMTP id j2PLsibK247564 for ; Fri, 25 Mar 2005 14:54:45 -0700 Received: from d03av02.boulder.ibm.com (loopback [127.0.0.1]) by d03av02.boulder.ibm.com (8.12.11/8.12.11) with ESMTP id j2PLsib7025998 for ; Fri, 25 Mar 2005 14:54:44 -0700 Subject: [RFC][PATCH 1/4] create mm/Kconfig for arch-independent memory options From: Dave Hansen Date: Fri, 25 Mar 2005 13:54:43 -0800 Message-Id: Sender: owner-linux-mm@kvack.org Return-Path: To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, Dave Hansen , apw@shadowen.org List-ID: 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 Signed-off-by: Dave Hansen --- 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 _ -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: aart@kvack.org