A farewell to tmem
Ten years ago, transcendent memory was
pushed as a way of enabling the system to make better use of available
RAM. The developer of this concept left the kernel community years ago,
though, and the concept has never quite taken off. In 5.3, it seems likely
that most of the transcendent-memory code will be
removed due to lack of maintainership. Some aspects of the frontswap mechanism are still used and will
remain, though.