A discussion that largely centered around the documentation of
iomap, which provides a block-mapping interface for modern filesystems,
was led by Luis Chamberlain that the
2023 Linux Storage, Filesystem,
Memory-Management and BPF Summit. There is an ongoing process of
converting filesystems to use iomap, in order to leave buffer heads
behind and to better support folios, so
the intent was to get feedback on the documentation from developers who are
working on those conversions. One of the concrete outcomes of the session
was a plan to move that documentation from its current location on the
KernelNewbies wiki into
the kernel documentation.

Source: LWN.net – [$] Converting filesystems to iomap