On Mon, Jun 24, 2019 at 05:12:43PM -0700, Song Liu wrote: > @@ -413,6 +413,7 @@ struct mem_size_stats { > unsigned long lazyfree; > unsigned long anonymous_thp; > unsigned long shmem_thp; > + unsigned long file_thp; This appears to be unused. Other than that, this looks good to me. It's a bit of a shame that it's not symmetrical with the anon THP stats, but that already diverged on shmem pages, so not your fault... Ah well. Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>