Patchwork [RFC,V7,19/19] memory-hotplug: remove sysfs file of node

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Submitter Wen Congyang
Date Aug. 20, 2012, 9:35 a.m.
Message ID <1345455342-27752-20-git-send-email-wency@cn.fujitsu.com>
Download mbox | patch
Permalink /patch/178740/
State Not Applicable
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Comments

Wen Congyang - Aug. 20, 2012, 9:35 a.m.
From: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>

The patch adds node_set_offline() and unregister_one_node() to remove_memory()
for removing sysfs file of node.

CC: David Rientjes <rientjes@google.com>
CC: Jiang Liu <liuj97@gmail.com>
CC: Len Brown <len.brown@intel.com>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
CC: Christoph Lameter <cl@linux.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
CC: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
---
 mm/memory_hotplug.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

Patch

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 00c050f..e5928c7 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1279,6 +1279,11 @@  int __ref remove_memory(int nid, u64 start, u64 size)
 	/* remove memmap entry */
 	firmware_map_remove(start, start + size, "System RAM");
 
+	if (!node_present_pages(nid)) {
+		node_set_offline(nid);
+		unregister_one_node(nid);
+	}
+
 	arch_remove_memory(start, size);
 out:
 	unlock_memory_hotplug();