make sure to wake up all threads when we might have gone below the maximum
make sure to wake up all threads when we might have gone below the maximum

h2o/h2o,h2o/h2o,devnexen/h2o,h2o/h2o,h2o/h2o,cwyang/h2o,h2o/h2o,h2o/h2o,cwyang/h2o,yannick/h2o,yannick/h2o,devnexen/h2o,cwyang/h2o,devnexen/h2o,devnexen/h2o,cwyang/h2o,cwyang/h2o,yannick/h2o,devnexen/h2o,h2o/h2o,cwyang/h2o,h2o/h2o,devnexen/h2o,yannick/h2o,h2o/h2o,devnexen/h2o,yannick/h2o,yannick/h2o,devnexen/h2o,yannick/h2o,yannick/h2o,yannick/h2o,devnexen/h2o,cwyang/h2o,cwyang/h2o