migration: print expected downtime in info migrate

Signed-off-by: Juan Quintela <quintela@redhat.com>
diff --git a/arch_init.c b/arch_init.c
index 1d6dda8..3fddb38 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -539,6 +539,7 @@
     int ret;
     int i;
     uint64_t expected_downtime;
+    MigrationState *s = migrate_get_current();
 
     bytes_transferred_last = bytes_transferred;
     bwidth = qemu_get_clock_ns(rt_clock);
@@ -593,6 +594,7 @@
     if (expected_downtime <= migrate_max_downtime()) {
         memory_global_sync_dirty_bitmap(get_system_memory());
         expected_downtime = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
+        s->expected_downtime = expected_downtime / 1000000; /* ns -> ms */
 
         return expected_downtime <= migrate_max_downtime();
     }