remove PAF_LOCK for journal buffer. It has caused trouble for mlock() limit.
remove PAF_LOCK for journal buffer. It has caused trouble for mlock()
limit.

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