sentences:  Occasionally, the -mm tree was overloaded with new patches, so testing it became overly difficult.On Sep 17 2007, Andrew Morton sent a mail saying that "this just isn't working any more".The presence of the new linux-next git repository has offloaded much of the work that made mm maintenance so difficult, allowing Andrew Morton to continue to use Quilt to manage his series of "mmotm" (mm of the moment) patches.