diff options
| author | Eric Dumazet <edumazet@google.com> | 2021-11-05 13:39:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-11-06 13:30:36 -0700 |
| commit | 51e50b3a22937ab7b350f05af7e3b79b7ff73dd3 (patch) | |
| tree | 26b01d42c19979bd8c22ca0e8546c1c9f38da694 | |
| parent | bd1a8fb2d43f7c293383f76691d7a55f7f89d9da (diff) | |
| download | lwn-51e50b3a22937ab7b350f05af7e3b79b7ff73dd3.tar.gz lwn-51e50b3a22937ab7b350f05af7e3b79b7ff73dd3.zip | |
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 <edumazet@google.com>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/vmalloc.c | 6 |
1 files changed, 3 insertions, 3 deletions
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]); |