combine two psc_alloc() into one:
combine two psc_alloc() into one:

bash-4.2# ./msctl -p sys.rss
parameter                                      value
================================================================================
sys.rss                                        370404 kB

pscedu/slash2-stable,pscedu/pfl,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/pfl,pscedu/slash2-stable,pscedu/pfl,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/pfl,pscedu/slash2-stable