Re: [PATCH v6 4/7] xfs: Support FS_XFLAG_ATOMICWRITES

[Christoph Hellwig]

On Mon, Sep 30, 2024 at 09:03:49AM -0700, Darrick J. Wong wrote:
> If we're only allowing atomic writes that are 1 fsblock or less, then
> copy on write will work correctly because CoWs are always done with
> fsblock granularity.  The ioend remap is also committed atomically.
> 
> IOWs, it's forcealign that isn't compatible with reflink and you can
> drop this incompatibility.

That was my thought as well when reading through this patch.