Commit 51e50b3a authored by Eric Dumazet's avatar Eric Dumazet Committed by Linus Torvalds
Browse files

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: default avatarEric Dumazet <edumazet@google.com>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent bd1a8fb2

mm/vmalloc.c

+3 −3
Original line number Diff line number Diff line
@@ -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]);