[Qemu-devel] [PATCH] numa: check for busy memory backend

[Hu Tao <hutao@cn.fujitsu.com>]

..to prevent one memory backend from being used by more than one numa
node.

Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
---
 numa.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/numa.c b/numa.c
index e471afe..6c1c554 100644
--- a/numa.c
+++ b/numa.c
@@ -279,6 +279,13 @@ void memory_region_allocate_system_memory(MemoryRegion *mr, Object *owner,
             exit(1);
         }
 
+        if (memory_region_is_mapped(seg)) {
+            char *path = object_get_canonical_path_component(OBJECT(backend));
+            error_report("memory backend %s is busy", path);
+            g_free(path);
+            exit(1);
+        }
+
         memory_region_add_subregion(mr, addr, seg);
         vmstate_register_ram_global(seg);
         addr += size;
-- 
1.9.3