diff options
| -rw-r--r-- | fs/proc/task_mmu.c | 87 |
1 files changed, 47 insertions, 40 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 78fd3621f565..5cd06fa3106b 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -333,56 +333,63 @@ struct mem_size_stats { u64 pss; }; -static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, - struct mm_walk *walk) + +static void smaps_pte_entry(pte_t ptent, unsigned long addr, + struct mm_walk *walk) { struct mem_size_stats *mss = walk->private; struct vm_area_struct *vma = mss->vma; - pte_t *pte, ptent; - spinlock_t *ptl; struct page *page; int mapcount; - split_huge_page_pmd(walk->mm, pmd); - - pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); - for (; addr != end; pte++, addr += PAGE_SIZE) { - ptent = *pte; + if (is_swap_pte(ptent)) { + mss->swap += PAGE_SIZE; + return; + } - if (is_swap_pte(ptent)) { - mss->swap += PAGE_SIZE; - continue; - } + if (!pte_present(ptent)) + return; + + page = vm_normal_page(vma, addr, ptent); + if (!page) + return; + + if (PageAnon(page)) + mss->anonymous += PAGE_SIZE; + + mss->resident += PAGE_SIZE; + /* Accumulate the size in pages that have been accessed. */ + if (pte_young(ptent) || PageReferenced(page)) + mss->referenced += PAGE_SIZE; + mapcount = page_mapcount(page); + if (mapcount >= 2) { + if (pte_dirty(ptent) || PageDirty(page)) + mss->shared_dirty += PAGE_SIZE; + else + mss->shared_clean += PAGE_SIZE; + mss->pss += (PAGE_SIZE << PSS_SHIFT) / mapcount; + } else { + if (pte_dirty(ptent) || PageDirty(page)) + mss->private_dirty += PAGE_SIZE; + else + mss->private_clean += PAGE_SIZE; + mss->pss += (PAGE_SIZE << PSS_SHIFT); + } +} - if (!pte_present(ptent)) - continue; +static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, + struct mm_walk *walk) +{ + struct mem_size_stats *mss = walk->private; + struct vm_area_struct *vma = mss->vma; + pte_t *pte; + spinlock_t *ptl; - page = vm_normal_page(vma, addr, ptent); - if (!page) - continue; + split_huge_page_pmd(walk->mm, pmd); - if (PageAnon(page)) - mss->anonymous += PAGE_SIZE; - - mss->resident += PAGE_SIZE; - /* Accumulate the size in pages that have been accessed. */ - if (pte_young(ptent) || PageReferenced(page)) - mss->referenced += PAGE_SIZE; - mapcount = page_mapcount(page); - if (mapcount >= 2) { - if (pte_dirty(ptent) || PageDirty(page)) - mss->shared_dirty += PAGE_SIZE; - else - mss->shared_clean += PAGE_SIZE; - mss->pss += (PAGE_SIZE << PSS_SHIFT) / mapcount; - } else { - if (pte_dirty(ptent) || PageDirty(page)) - mss->private_dirty += PAGE_SIZE; - else - mss->private_clean += PAGE_SIZE; - mss->pss += (PAGE_SIZE << PSS_SHIFT); - } - } + pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); + for (; addr != end; pte++, addr += PAGE_SIZE) + smaps_pte_entry(*pte, addr, walk); pte_unmap_unlock(pte - 1, ptl); cond_resched(); return 0; |