#ifdef CONFIG_PGTABLE_HAS_HUGE_LEAVES
@@ -952,6 +956,7 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
struct vm_area_struct *vma = walk->vma;
pte_t *pte;
spinlock_t *ptl;
+ unsigned long size, cont_ptes;
ptl = pmd_huge_lock(pmd, vma);
if (ptl) {
@@ -965,7 +970,9 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
walk->action = ACTION_AGAIN;
return 0;
}
- for (; addr != end; pte++, addr += PAGE_SIZE)
+ size = pte_cont(ptep_get(pte)) ? PAGE_SIZE * CONT_PTES : PAGE_SIZE;
+ cont_ptes = pte_cont(ptep_get(pte)) ? CONT_PTES : 1;
+ for (; addr != end; pte += cont_ptes, addr += size)
The better way to do this is to actually batch PTEs also when cont-pte
is not around (e.g., x86). folio_pte_batch() does that and optimized
automatically for the cont-pte bit -- which should only apply if we have
a present folio.
So this code might need some slight reshuffling (lookup the folio first,
if it's large use folio_pte_batch(), otherwise (small/no normal folio)
process individual PTEs).
--
Cheers,
David / dhildenb
