Re: [PATCH v9 13/15] xfs: add xfs_compute_atomic_write_unit_max()

[Darrick J. Wong]

On Wed, Apr 30, 2025 at 08:52:00AM +0100, John Garry wrote:
> On 25/04/2025 17:45, John Garry wrote:
> > +static inline xfs_extlen_t xfs_calc_perag_awu_max(struct xfs_mount *mp)
> > +{
> > +	if (mp->m_ddev_targp->bt_bdev_awu_min > 0)
> > +		return max_pow_of_two_factor(mp->m_sb.sb_agblocks);
> > +	return mp->m_ag_max_usable;
> 
> I think that this should be rounddown_pow_of_two(mp->m_ag_max_usable)
> 
> ditto for rt
> 
> I will fix (unless disagree).

I don't think this needs fixing.  If there's no hardware support on the
device, then we can do any size of atomic write that we want.

--D