xfs: correctly acount for reclaimable slabs

The XFS inode item slab actually reclaimed by inode shrinker
callbacks from the memory reclaim subsystem. These should be marked
as reclaimable so the mm subsystem has the full picture of how much
memory it can actually reclaim from the XFS slab caches.

Signed-off-by: Dave Chinner <[email protected]>
Reviewed-by: Brian Foster <[email protected]>
Reviewed-by: Allison Collins <[email protected]>
Reviewed-by: Darrick J. Wong <[email protected]>
Signed-off-by: Darrick J. Wong <[email protected]>

Author: Dave Chinner

fs/xfs/xfs_super.c

@@ -1861,7 +1861,8 @@ xfs_init_zones(void)
 
 	xfs_ili_zone = kmem_cache_create("xfs_ili",
 					 sizeof(struct xfs_inode_log_item), 0,
-					 SLAB_MEM_SPREAD, NULL);
+					 SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD,
+					 NULL);
 	if (!xfs_ili_zone)
 		goto out_destroy_inode_zone;