Re: [BUG] xfs: sparse inode allocation can trip i != 1 after AGFL growth

[Matt Fleming <matt@readmodwrite.com>]

On Wed, Jul 29, 2026 at 02:50:13PM -0400, Brian Foster wrote:
> 
> I want to think about that a little more and need to run more tests, but
> unless something better comes along I'll try to post that soonish. BTW,
> I had to make some tweaks to the reproducer test to make it work on my
> fedora based test vm. Is this something you plan to post for upstream
> inclusion?
> 
> Brian
> 
> --- 8< ---
> 
> diff --git a/tests/xfs/842 b/tests/xfs/842
> index 9e694a56..5455998f 100755
> --- a/tests/xfs/842
> +++ b/tests/xfs/842
> @@ -293,9 +293,9 @@ inspect_unmounted
>  read -r free reserved used <<<"$(ag0_reservation_state)"
>  reservation=$((reserved - used))
>  outside=$((free - reservation))
> -bno_level=$(agf_field 'levels[0]')
> -cnt_level=$(agf_field 'levels[1]')
> -rmap_level=$(agf_field 'levels[2]')
> +bno_level=$(agf_field bnolevel)
> +cnt_level=$(agf_field cntlevel)
> +rmap_level=$(agf_field rmaplevel)
>  flcount=$(agf_field flcount)
>  bno_recs=$(alloc_root_field bnoroot numrecs)
>  cnt_recs=$(alloc_root_field cntroot numrecs)

Thanks for catching this! Yeah I'll submit this upstream.

Thanks,
Matt