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authorMel Gorman <mel@skynet.ie>2006-09-27 01:49:59 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-27 08:26:12 -0700
commitfb01439c5b778d5974a488c5d4fe85e6d0e18a68 (patch)
treedd5483b2555adbdc51f215fcb010484d423f63a0 /include
parent9c7cd6877cf8db15269163deda69392263124c1e (diff)
downloadop-kernel-dev-fb01439c5b778d5974a488c5d4fe85e6d0e18a68.zip
op-kernel-dev-fb01439c5b778d5974a488c5d4fe85e6d0e18a68.tar.gz
[PATCH] Allow an arch to expand node boundaries
Arch-independent zone-sizing determines the size of a node (pgdat->node_spanned_pages) based on the physical memory that was registered by the architecture. However, when CONFIG_MEMORY_HOTPLUG_RESERVE is set, the architecture expects that the spanned_pages will be much larger and that mem_map will be allocated that is used lated on memory hot-add. This patch allows an architecture that sets CONFIG_MEMORY_HOTPLUG_RESERVE to call push_node_boundaries() which will set the node beginning and end to at *least* the requested boundary. Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Andi Kleen <ak@muc.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "Keith Mannthey" <kmannth@gmail.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mm.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 22936e1..9d046db 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -970,6 +970,8 @@ extern void add_active_range(unsigned int nid, unsigned long start_pfn,
unsigned long end_pfn);
extern void shrink_active_range(unsigned int nid, unsigned long old_end_pfn,
unsigned long new_end_pfn);
+extern void push_node_boundaries(unsigned int nid, unsigned long start_pfn,
+ unsigned long end_pfn);
extern void remove_all_active_ranges(void);
extern unsigned long absent_pages_in_range(unsigned long start_pfn,
unsigned long end_pfn);
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