linux-kernel - [RFC] memory hotremove patch take 2 [06/10] (ia64's remove

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Message-Id: <20070509120643.B912.Y-GOTO@jp.fujitsu.com>
Date:	Wed, 09 May 2007 12:11:29 +0900
From:	Yasunori Goto <y-goto@...fujitsu.com>
To:	Linux Kernel ML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>
Cc:	Andrew Morton <akpm@...l.org>,
	Christoph Lameter <clameter@....com>,
	Mel Gorman <mel@....ul.ie>
Subject: [RFC] memory hotremove patch take 2 [06/10] (ia64's remove_memory code)

Call offline pages from remove_memory().
Signed-off-by: Yasunori Goto <y-goto@...fujitsu.com>

Signed-Off-By: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
 arch/ia64/mm/init.c |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletion(-)

Index: current_test/arch/ia64/mm/init.c
===================================================================
--- current_test.orig/arch/ia64/mm/init.c	2007-05-08 15:07:20.000000000 +0900
+++ current_test/arch/ia64/mm/init.c	2007-05-08 15:08:07.000000000 +0900
@@ -726,7 +726,18 @@ 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

-- 
Yasunori Goto 


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