[libvirt] [PATCH] qemu: fix migration fail of an auto-placement vm after attached memory to it

[Yi Wang]

This patch fix this condition:
  -vm has the "auto" placement in vcpu
  -hot-plug memory with source node "1-3" through attach-device command
  -migrate the vm to a host with only 2 numa node
And the migration will fail with error:
"error: unsupported configuration: NUMA node 2 is unavailable"

Signed-off-by: Yi Wang <wang.yi59 at zte.com.cn>
Signed-off-by: Xi Xu <xu.xi8 at zte.com.cn>
---
 src/qemu/qemu_process.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 7b708be..dcc564c 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -5259,6 +5259,16 @@ qemuProcessPrepareDomain(virConnectPtr conn,
             goto cleanup;
     }
 
+    VIR_DEBUG("Updating memory source nodes");
+    for (i = 0; i < vm->def->nmems; i++) {
+        virDomainMemoryDefPtr mem = vm->def->mems[i];
+        if (priv->autoNodeset && mem && mem->sourceNodes) {
+            virBitmapFree(mem->sourceNodes);
+            if (!(mem->sourceNodes = virBitmapNewCopy(priv->autoNodeset)))
+                goto cleanup;
+        }
+    }
+
     /* Whether we should use virtlogd as stdio handler for character
      * devices source backend. */
     if (cfg->stdioLogD &&
-- 
1.8.3.1