Snapshotting successful

After having struggled with DMTCP and having decided to mail the developers there has been a lot of help coming from their side.
Together it became apparent that I was in need of the plugin system that DMTCP offers.
Example:

void dmtcp_process_event(DmtcpEvent_t event, void* data)
{
  /* NOTE:  See warning in plugin/README about calls to printf here. */
  switch (event) {
  case DMTCP_EVENT_INIT:
    printf("The plugin containing %s has been initialized.\n", __FILE__);
    break;
  case DMTCP_EVENT_PRE_CHECKPOINT:
    printf("\n*** The plugin is being called before checkpointing. ***\n");
    break;
  case DMTCP_EVENT_POST_CHECKPOINT:
    printf("*** The plugin has now been checkpointed. ***\n");
    break;
  case DMTCP_EVENT_POST_CHECKPOINT_RESUME:
    printf("The process is now resuming after checkpoint.\n");
    break;
  case DMTCP_EVENT_POST_RESTART_RESUME:
    printf("The plugin is now resuming or restarting from checkpointing.\n");
    break;
  case DMTCP_EVENT_PRE_EXIT:
    printf("The plugin is being called before exiting.\n");
    break;
  /* These events are unused and could be omitted.  See dmtcpplugin.h for
   * complete list.
   */
  case DMTCP_EVENT_POST_RESTART:
  case DMTCP_EVENT_RESET_ON_FORK:
  case DMTCP_EVENT_POST_SUSPEND:
  case DMTCP_EVENT_POST_LEADER_ELECTION:
  case DMTCP_EVENT_POST_DRAIN:
  default:
    break;
  }
  NEXT_DMTCP_PROCESS_EVENT(event, data);
}

But as stated in one of my previous posts, system calls were impossible.
After having mentioned this to the developers (Kapil Arya in particular), this function is now supported.
As a result we can now take complete snapshots of a VM right after the DMTCP checkpoint files are written to disk and before the program which snapshot we are taking has been restarted.

Many thanks to the development team of DMTCP for all their aid !