[RFC] memory unplug v5 [6/6] ia64 interface

[KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>]

IA64 memory unplug interface.

Signed-Off-By: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>

---
 arch/ia64/mm/init.c |   12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

Index: devel-2.6.22-rc4-mm2/arch/ia64/mm/init.c
===================================================================
--- devel-2.6.22-rc4-mm2.orig/arch/ia64/mm/init.c
+++ devel-2.6.22-rc4-mm2/arch/ia64/mm/init.c
@@ -724,7 +724,17 @@ int arch_add_memory(int nid, u64 start, 
 
 int remove_memory(u64 start, u64 size)
 {
-	return -EINVAL;
+	unsigned long start_pfn, end_pfn;
+	unsigned long timeout = 120 * HZ;
+	int ret;
+	start_pfn = start >> PAGE_SHIFT;
+	end_pfn = start_pfn + (size >> PAGE_SHIFT);
+	ret = offline_pages(start_pfn, end_pfn, timeout);
+	if (ret)
+		goto out;
+	/* we can free mem_map at this point */
+out:
+	return ret;
 }
 EXPORT_SYMBOL_GPL(remove_memory);
 #endif

--
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: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>