Re: [PATCH RFC] statx.2: Add stx_atomic_write_unit_max_opt

On Thu, Apr 03, 2025 at 04:07:04PM +0100, John Garry wrote:

So I am thinking one of these:
a. stx_atomic_write_unit_max_dev
b. stx_atomic_write_unit_max_bdev
c. stx_atomic_write_unit_max_align
d. stx_atomic_write_unit_max_hw

The terms dev (or device) and bdev are already used in the meaning of some 
members in struct statx, so not too bad. However, when we support large 
atomic writes for XFS rtvol, the bdev atomic write limit and rtextsize 
would influence this value (so just bdev might be a bit misleading in the 
name).

Don't.  Especially when you have a natively out of write file system
that optimized case will not involve the usual hardware offload.