It's believed that RDMA + postcopy-ram has been broken for a while.
Rather than spending time re-enabling it, let's simply disable it as a
trade-off.

Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
---
 migration/migration.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/migration/migration.c b/migration/migration.c
index 2eacae25e0e..d414a4b1379 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -251,6 +251,10 @@ migration_capabilities_and_transport_compatible(MigrationAddress *addr,
             error_setg(errp, "RDMA and multifd can't be used together");
             return false;
         }
+        if (migrate_postcopy_ram()) {
+            error_setg(errp, "RDMA and postcopy-ram can't be used together");
+            return false;
+        }
     }
 
     return true;
-- 
2.44.0