[PATCH v3 07/13] numa_maps: remove numa_maps->vma

Naoya Horiguchi
2014-06-20T20:12:24Z

pagewalk.c can handle vma in itself, so we don't have to pass vma via
walk->private. And show_numa_map() walks pages on vma basis, so using
walk_page_vma() is preferable.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
---
fs/proc/task_mmu.c | 18 ++++++++----------
1 file changed, 8 insertions(+), 10 deletions(-)

diff --git v3.16-rc1.orig/fs/proc/task_mmu.c v3.16-rc1/fs/proc/task_mmu.c
index 74f87794afab..b4459c006d50 100644
--- v3.16-rc1.orig/fs/proc/task_mmu.c
+++ v3.16-rc1/fs/proc/task_mmu.c
@@ -1247,7 +1247,6 @@ const struct file_operations proc_pagemap_operations = {
#ifdef CONFIG_NUMA

struct numa_maps {
- struct vm_area_struct *vma;
unsigned long pages;
unsigned long anon;
unsigned long active;
@@ -1316,18 +1315,17 @@ static struct page *can_gather_numa_stats(pte_t pte, struct vm_area_struct *vma,
static int gather_pte_stats(pmd_t *pmd, unsigned long addr,
unsigned long end, struct mm_walk *walk)
{
- struct numa_maps *md;
+ struct numa_maps *md = walk->private;
+ struct vm_area_struct *vma = walk->vma;
spinlock_t *ptl;
pte_t *orig_pte;
pte_t *pte;

- md = walk->private;
-
- if (pmd_trans_huge_lock(pmd, md->vma, &ptl) == 1) {
+ if (pmd_trans_huge_lock(pmd, vma, &ptl) == 1) {
pte_t huge_pte = *(pte_t *)pmd;
struct page *page;

- page = can_gather_numa_stats(huge_pte, md->vma, addr);
+ page = can_gather_numa_stats(huge_pte, vma, addr);
if (page)
gather_stats(page, md, pte_dirty(huge_pte),
HPAGE_PMD_SIZE/PAGE_SIZE);
@@ -1339,7 +1337,7 @@ static int gather_pte_stats(pmd_t *pmd, unsigned long addr,
return 0;
orig_pte = pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
do {
- struct page *page = can_gather_numa_stats(*pte, md->vma, addr);
+ struct page *page = can_gather_numa_stats(*pte, vma, addr);
if (!page)
continue;
gather_stats(page, md, pte_dirty(*pte), 1);
@@ -1398,12 +1396,11 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid)
/* Ensure we start with an empty set of numa_maps statistics. */
memset(md, 0, sizeof(*md));

- md->vma = vma;
-
walk.hugetlb_entry = gather_hugetbl_stats;
walk.pmd_entry = gather_pte_stats;
walk.private = md;
walk.mm = mm;
+ walk.vma = vma;

pol = get_vma_policy(task, vma, vma->vm_start);
mpol_to_str(buffer, sizeof(buffer), pol);
@@ -1434,7 +1431,8 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid)
if (is_vm_hugetlb_page(vma))
seq_puts(m, " huge");

- walk_page_range(vma->vm_start, vma->vm_end, &walk);
+ /* mmap_sem is held by m_start */
+ walk_page_vma(vma, &walk);

if (!md->pages)
goto out;
--
1.9.3