On 16/11/2025 08:11, Dave Chinner wrote:

quoted

This patch set focuses on HW accelerated single block atomic writes with
buffered IO, to get some early reviews on the core design.

What hardware acceleration? Hardware atomic writes are do not make
IO faster; they only change IO failure semantics in certain corner
cases.

I think that he references using REQ_ATOMIC-based bio vs xfs 
software-based atomic writes (which reuse the CoW infrastructure). And 
the former is considerably faster from my testing (for DIO, obvs). But 
the latter has not been optimized.