ULE is not an acronym.

FreeBSD の新しいスケジューラ ULEって何の略だろうって、ずっと思ってたんだけど(←調べろ)、”The Design and Implementation of the FreeBSD Operating System” 読んでたら次のように書いてあった。

The new ULE scheduler first introduced in FreeBSD 5.0 and foud in the file /sys/kern/sched_ule.c.
The name is not an acornym.
If the underscore in its file name is removed, the rationale for its name becomes apparent.

ぎゃふん。

Design and Implementation of the FreeBSD Operating System, The