On Thu, Mar 20, 2025 at 10:39:30AM -0700, Suren Baghdasaryan wrote:

From: Minchan Kim <redacted>

This patch introduces GCMA (Guaranteed Contiguous Memory Allocator)
cleacache backend which reserves some amount of memory at the boot
and then donates it to store clean file-backed pages in the cleancache.
GCMA aims to guarantee contiguous memory allocation success as well as
low and deterministic allocation latency.

Notes:
Originally, the idea was posted by SeongJae Park and Minchan Kim [1].
Later Minchan reworked it to be used in Android as a reference for
Android vendors to use [2].

That is not a very good summay.  It needs to explain how you ensure
that the pages do stay clean forever.