Re: [PATCH 2/3] xfs: account newly added RTGs as free zones in growfs

["Darrick J. Wong" <djwong@kernel.org>]

On Tue, Jun 09, 2026 at 09:56:42AM +0200, Christoph Hellwig wrote:
> When growing a zoned RT section, the newly added RTGs also need to be
> tagged as free in the radix tree and add to the nr_free_zones counters.
> Call xfs_add_free_zone to do that, otherwise using up the newly added
> space will wait for free zones forever.
> 
> Fixes: 01b71e64bb87 ("xfs: support growfs on zoned file systems")
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Good catch; glad there's a new fstest for it.

Cc: <stable@vger.kernel.org> # v6.15
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>

--D

> ---
>  fs/xfs/xfs_rtalloc.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
> index 153f3c378f9f..fd07c1a18615 100644
> --- a/fs/xfs/xfs_rtalloc.c
> +++ b/fs/xfs/xfs_rtalloc.c
> @@ -933,6 +933,7 @@ xfs_growfs_rt_zoned(
>  	mp->m_features |= XFS_FEAT_REALTIME;
>  	xfs_rtrmapbt_compute_maxlevels(mp);
>  	xfs_rtrefcountbt_compute_maxlevels(mp);
> +	xfs_add_free_zone(rtg);
>  	xfs_zoned_add_available(mp, freed_rtx);
>  out_free:
>  	kfree(nmp);
> -- 
> 2.53.0
> 
>