From: Ye Liu Add a header line to /proc/buddyinfo that shows the order numbers for better readability and clarity. Before: Node 0, zone DMA 0 0 0 0 0 0 0 ... Node 0, zone DMA32 5 8 6 6 7 5 8 ... Node 0, zone Normal 1113 351 138 65 38 31 25 ... After: Free pages per order 0 1 2 3 4 5 6 ... Node 0, zone DMA 0 0 0 0 0 0 0 ... Node 0, zone DMA32 5 8 6 6 7 5 8 ... Node 0, zone Normal 1113 351 138 65 38 31 25 ... Signed-off-by: Ye Liu --- mm/vmstat.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/mm/vmstat.c b/mm/vmstat.c index bb09c032eecf..e9606457ab91 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1574,7 +1574,14 @@ static void frag_show_print(struct seq_file *m, pg_data_t *pgdat, */ static int frag_show(struct seq_file *m, void *arg) { + int order; pg_data_t *pgdat = (pg_data_t *)arg; + /* Print header */ + seq_printf(m, "%-21s ", "Free pages per order"); + for (order = 0; order < NR_PAGE_ORDERS; ++order) + seq_printf(m, "%6d ", order); + seq_putc(m, '\n'); + walk_zones_in_node(m, pgdat, true, false, frag_show_print); return 0; } -- 2.43.0