On Fri, Mar 05, 2021 at 04:18:37AM +0000, Matthew Wilcox (Oracle) wrote:

A struct folio refers to an entire (possibly compound) page.  A function
which takes a struct folio argument declares that it will operate on the
entire compound page, not just PAGE_SIZE bytes.  In return, the caller
guarantees that the pointer it is passing does not point to a tail page.

Is this a part of a larger use case or general cleanup/refactor where
the split between page and folio simplify programming?

Balbir Singh.