Hi Wen,
2012/07/27 19:36, Wen Congyang wrote:
From: Yasuaki Ishimatsu <isimatu.yasu...@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 <rient...@google.com>
CC: Jiang Liu <liu...@gmail.com>
CC: Len Brown <len.br...@intel.com>
CC: Benjamin Herrenschmidt <b...@kernel.crashing.org>
CC: Paul Mackerras <pau...@samba.org>
CC: Christoph Lameter <c...@linux.com>
Cc: Minchan Kim <minchan....@gmail.com>
CC: Andrew Morton <a...@linux-foundation.org>
CC: KOSAKI Motohiro <kosaki.motoh...@jp.fujitsu.com>
CC: Wen Congyang <we...@cn.fujitsu.com>
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasu...@jp.fujitsu.com>
---
mm/memory_hotplug.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 5ac035f..5681968 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1267,6 +1267,11 @@ 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)) {
Applying [PATCH v5 17/19], pgdat->node_spanned_pages can become 0 when
all memory of the pgdat is removed. When pgdat->node_spanned_pages is 0,
it means the pgdat has no memory. So I think node_spanned_pages() is
better.
Thanks,
Yasuaki Ishimatsu
+ node_set_offline(nid);
+ unregister_one_node(nid);
+ }
+
arch_remove_memory(start, size);
out:
unlock_memory_hotplug();
--
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