On Tue, Apr 16, 2024 at 08:13:35PM +0000, Sourav Panda wrote: > +++ b/include/linux/mmzone.h > @@ -217,6 +217,10 @@ enum node_stat_item { > PGDEMOTE_KSWAPD, > PGDEMOTE_DIRECT, > PGDEMOTE_KHUGEPAGED, > + NR_MEMMAP, /* Page metadata size (struct page and page_ext) > + * in pages > + */ This is not how we write comments in the kernel ...