Re: [PATCH 2/2] xfs/21[67]: fix mkfs log concurrency detection

[Christoph Hellwig <hch@infradead.org>]

On Wed, May 20, 2026 at 12:01:12PM -0700, Darrick J. Wong wrote:
> +_mkfs_xfs_supported()

Can you add a top of function comment explaininging this helper?

> +{
> +	local mkfs_opts=$*
> +
> +	$MKFS_XFS_PROG -f -N $MKFS_OPTIONS $mkfs_opts
> +	local mkfs_status=$?
> +
> +	# a mkfs failure may be caused by conflicts between $MKFS_OPTIONS and
> +	# $mkfs_opts, try again without $MKFS_OPTIONS
> +	if [ $mkfs_status -ne 0 -a -n "$mkfs_opts" ]; then
> +		$MKFS_XFS_PROG -f -N $mkfs_opts
> +		mkfs_status=$?
> +	fi

Do we want this for a helper like this?  The automatic dropping of
options has been a major source of mess, and if we're using a helper
that checks to see if mkfs works, returning false and then _notrun()ing
would seem like the saner option in general.