The transition to folios has transformed
the memory-management subsystem in a number of ways, but has also resulted
in a lot of code churn that has not been welcomed by all developers. As
this work proceeds, though, some of the benefits from it are beginning to
become clear. One example may well be in the handling of anonymous memory,
as can be seen in a pair of patch sets from Ryan Roberts.

Source: LWN.net – [$] Large folios for anonymous memory