Merge tag 'random-fixes-6.6_2023-10-11' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.6-fixesD

xfs: random fixes for 6.6

Rollup of a couple of reviewed fixes.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>

* tag 'random-fixes-6.6_2023-10-11' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux:
  xfs: process free extents to busy list in FIFO order
  xfs: adjust the incore perag block_count when shrinking

Author: Chandan Babu R

fs/xfs/libxfs/xfs_ag.c

@@ -1001,6 +1001,12 @@ xfs_ag_shrink_space(
 		error = -ENOSPC;
 		goto resv_init_out;
 	}
+
+	/* Update perag geometry */
+	pag->block_count -= delta;
+	__xfs_agino_range(pag->pag_mount, pag->block_count, &pag->agino_min,
+				&pag->agino_max);
+
 	xfs_ialloc_log_agi(*tpp, agibp, XFS_AGI_LENGTH);
 	xfs_alloc_log_agf(*tpp, agfbp, XFS_AGF_LENGTH);
 	return 0;

fs/xfs/xfs_extent_busy.c

@@ -62,7 +62,8 @@ xfs_extent_busy_insert_list(
 	rb_link_node(&new->rb_node, parent, rbp);
 	rb_insert_color(&new->rb_node, &pag->pagb_tree);
 
-	list_add(&new->list, busy_list);
+	/* always process discard lists in fifo order */
+	list_add_tail(&new->list, busy_list);
 	spin_unlock(&pag->pagb_lock);
 }