Re: [PATCH 6.12.y] xfs: use deferred intent items for reaping crosslinked blocks

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

On Mon, Oct 20, 2025 at 11:49:51AM -0400, Sasha Levin wrote:
> From: "Darrick J. Wong" <djwong@kernel.org>
> 
> [ Upstream commit cd32a0c0dcdf634f2e0e71f41c272e19dece6264 ]
> 
> When we're removing rmap records for crosslinked blocks, use deferred
> intent items so that we can try to free/unmap as many of the old data
> structure's blocks as we can in the same transaction as the commit.
> 
> Cc: <stable@vger.kernel.org> # v6.6
> Fixes: 1c7ce115e52106 ("xfs: reap large AG metadata extents when possible")
> Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
> Reviewed-by: Christoph Hellwig <hch@lst.de>
> [ adapted xfs_refcount_free_cow_extent() and xfs_rmap_free_extent() ]
> Signed-off-by: Sasha Levin <sashal@kernel.org>

Looks good to me,
Acked-by: "Darrick J. Wong" <djwong@kernel.org>

--D

> ---
>  fs/xfs/scrub/reap.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/fs/xfs/scrub/reap.c b/fs/xfs/scrub/reap.c
> index 53697f3c5e1b0..8688edec58755 100644
> --- a/fs/xfs/scrub/reap.c
> +++ b/fs/xfs/scrub/reap.c
> @@ -409,8 +409,6 @@ xreap_agextent_iter(
>  	if (crosslinked) {
>  		trace_xreap_dispose_unmap_extent(sc->sa.pag, agbno, *aglenp);
>  
> -		rs->force_roll = true;
> -
>  		if (rs->oinfo == &XFS_RMAP_OINFO_COW) {
>  			/*
>  			 * If we're unmapping CoW staging extents, remove the
> @@ -418,11 +416,14 @@ xreap_agextent_iter(
>  			 * rmap record as well.
>  			 */
>  			xfs_refcount_free_cow_extent(sc->tp, fsbno, *aglenp);
> +			rs->force_roll = true;
>  			return 0;
>  		}
>  
> -		return xfs_rmap_free(sc->tp, sc->sa.agf_bp, sc->sa.pag, agbno,
> -				*aglenp, rs->oinfo);
> +		xfs_rmap_free_extent(sc->tp, sc->sa.pag->pag_agno, agbno,
> +				*aglenp, rs->oinfo->oi_owner);
> +		rs->deferred++;
> +		return 0;
>  	}
>  
>  	trace_xreap_dispose_free_extent(sc->sa.pag, agbno, *aglenp);
> -- 
> 2.51.0
>