From 51e50b3a22937ab7b350f05af7e3b79b7ff73dd3 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Fri, 5 Nov 2021 13:39:25 -0700 Subject: mm/vmalloc: make show_numa_info() aware of hugepage mappings show_numa_info() can be slightly faster, by skipping over hugepages directly. Link: https://lkml.kernel.org/r/20211001172725.105824-1-eric.dumazet@gmail.com Signed-off-by: Eric Dumazet Cc: Uladzislau Rezki (Sony) Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/vmalloc.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'mm/vmalloc.c') diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 4a11abd9e70f..6c1b97fd9b3d 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -3864,6 +3864,7 @@ static void show_numa_info(struct seq_file *m, struct vm_struct *v) { if (IS_ENABLED(CONFIG_NUMA)) { unsigned int nr, *counters = m->private; + unsigned int step = 1U << vm_area_page_order(v); if (!counters) return; @@ -3875,9 +3876,8 @@ static void show_numa_info(struct seq_file *m, struct vm_struct *v) memset(counters, 0, nr_node_ids * sizeof(unsigned int)); - for (nr = 0; nr < v->nr_pages; nr++) - counters[page_to_nid(v->pages[nr])]++; - + for (nr = 0; nr < v->nr_pages; nr += step) + counters[page_to_nid(v->pages[nr])] += step; for_each_node_state(nr, N_HIGH_MEMORY) if (counters[nr]) seq_printf(m, " N%u=%u", nr, counters[nr]); -- cgit