news: Document the `role` attribute for shmem device

Signed-off-by: Wang Xin <wangxinxin.wang@huawei.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>

diff --git a/NEWS.rst b/NEWS.rst
index 2d30d5a5e8430ceb7df9401cbed81df9c6399409..852746eb2a5d738ff8fdea5998ac961832ea5e3e 100644 (file)
--- a/NEWS.rst
+++ b/NEWS.rst
@@ -25,6 +25,11 @@ v6.7.0 (unreleased)
     the ``device_model_args`` setting in xl.cfg(5). The libvirt xen driver now
     supports this using ``<xen:commandline/>`` XML extensions.
 
+  * shmem: Add support for shmem-{plain, doorbell} ``role`` option
+
+    The ``role`` attribute controls how the domain behaves on migration. With
+    ``role=master``, the guest will copy the shared memory on migration to
+    the destination host. With ``role=peer``, the migration is disabled.
 
 * **Improvements**