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@xxxxxxxxxxxxx>
Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
fs/proc/task_mmu.c | 29 +++++++++++++----------------
1 file changed, 13 insertions(+), 16 deletions(-)
diff --git mmotm-2014-11-05-16-01.orig/fs/proc/task_mmu.c mmotm-2014-11-05-16-01/fs/proc/task_mmu.c
index bddae83fbf39..e7d86b97598b 100644
--- mmotm-2014-11-05-16-01.orig/fs/proc/task_mmu.c
+++ mmotm-2014-11-05-16-01/fs/proc/task_mmu.c
@@ -1290,7 +1290,6 @@ 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;
@@ -1359,18 +1358,17 @@ 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);
@@ -1382,7 +1380,7 @@ 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);
@@ -1429,7 +1427,12 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid)
struct numa_maps *md = &numa_priv->md;
struct file *file = vma->vm_file;
struct mm_struct *mm = vma->vm_mm;
- struct mm_walk walk = {};
+ struct mm_walk walk = {
+ .hugetlb_entry = gather_hugetlb_stats,
+ .pmd_entry = gather_pte_stats,
+ .private = md,
+ .mm = mm,
+ };
struct mempolicy *pol;
char buffer[64];
int nid;
@@ -1440,13 +1443,6 @@ 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_hugetlb_stats;
- walk.pmd_entry = gather_pte_stats;
- walk.private = md;
- walk.mm = mm;
-
pol = __get_vma_policy(vma, vma->vm_start);
if (pol) {
mpol_to_str(buffer, sizeof(buffer), pol);
@@ -1480,7 +1476,8 @@ 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;
--
2.2.0.rc0.2.gf745acb
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href