linux-kernel - [PATCH 3/10] hot-add-mem x86

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Date:	Fri, 4 Aug 2006 07:14:03 -0600
From:	Keith Mannthey <kmannth@...ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...l.org, discuss@...-64.org,
	Keith Mannthey <kmannth@...ibm.com>, ak@...e.de,
	lhms-devel@...ts.sourceforge.net, kamezawa.hiroyu@...fujitsu.com
Subject: [PATCH 3/10] hot-add-mem x86_64: Kconfig changes

From: Keith Mannthey <kmannth@...ibm.com>

Create Kconfig namespace for MEMORY_HOTPLUG_RESERVE and MEMORY_HOTPLUG_SPARSE. 
This is needed to create a disticiton between the 2 paths. Selecting the high 
level opiton of MEMORY_HOTPLUG will get you MEMORY_HOTPLUG_SPARSE if you have 
sparsemem enabled or MEMORY_HOTPLUG_RESERVE if you are x86_64 with discontig 
and ACPI numa support. 


Signed-off-by: Keith Mannthey<kmannth@...ibm.com>
---
 arch/x86_64/Kconfig |    4 ++++
 mm/Kconfig          |    7 ++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff -urN linux-2.6.18-rc3-stock/arch/x86_64/Kconfig linux-2.6.17/arch/x86_64/Kconfig
--- linux-2.6.18-rc3-stock/arch/x86_64/Kconfig	2006-07-31 21:08:04.000000000 -0400
+++ linux-2.6.17/arch/x86_64/Kconfig	2006-07-31 21:24:54.000000000 -0400
@@ -349,6 +349,10 @@
 
 source "mm/Kconfig"
 
+config MEMORY_HOTPLUG_RESERVE
+	def_bool y
+	depends on (MEMORY_HOTPLUG && DISCONTIGMEM)
+
 config HAVE_ARCH_EARLY_PFN_TO_NID
 	def_bool y
 	depends on NUMA
diff -urN linux-2.6.18-rc3-stock/mm/Kconfig linux-2.6.17/mm/Kconfig
--- linux-2.6.18-rc3-stock/mm/Kconfig	2006-07-31 21:08:04.000000000 -0400
+++ linux-2.6.17/mm/Kconfig	2006-07-31 21:25:18.000000000 -0400
@@ -115,12 +115,17 @@
 # eventually, we can have this option just 'select SPARSEMEM'
 config MEMORY_HOTPLUG
 	bool "Allow for memory hot-add"
-	depends on SPARSEMEM && HOTPLUG && !SOFTWARE_SUSPEND && ARCH_ENABLE_MEMORY_HOTPLUG
+	depends on SPARSEMEM || X86_64_ACPI_NUMA 
+	depends on HOTPLUG && !SOFTWARE_SUSPEND && ARCH_ENABLE_MEMORY_HOTPLUG
 	depends on (IA64 || X86 || PPC64)
 
 comment "Memory hotplug is currently incompatible with Software Suspend"
 	depends on SPARSEMEM && HOTPLUG && SOFTWARE_SUSPEND
 
+config MEMORY_HOTPLUG_SPARSE
+	def_bool y
+	depends on SPARSEMEM && MEMORY_HOTPLUG
+
 # 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.
-
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