Commit 7477d756 authored by SeongJae Park's avatar SeongJae Park Committed by Andrew Morton
Browse files

mm/damon/vaddr: record appropriate folio size when the access is not found 

DAMON virtual address spaces monitoring operations set doesn't set folio
size of the access checked address if access is not found.  It could
result in unnecessary and inefficient repeated check.  Appropriately set
the size regardless of access check result.

Link: https://lkml.kernel.org/r/20230109213335.62525-4-sj@kernel.org


Signed-off-by: default avatarSeongJae Park <sj@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 18fd73db

mm/damon/vaddr.c

+6 −9
Original line number Diff line number Diff line
@@ -452,10 +452,9 @@ static int damon_young_pmd_entry(pmd_t *pmd, unsigned long addr, 
			goto huge_out;

		if (pmd_young(*pmd) || !folio_test_idle(folio) ||

					mmu_notifier_test_young(walk->mm,

						addr)) {

			*priv->folio_sz = HPAGE_PMD_SIZE;

						addr))

			priv->young = true;

		}

		*priv->folio_sz = HPAGE_PMD_SIZE;

		folio_put(folio);

huge_out:

		spin_unlock(ptl);
@@ -474,10 +473,9 @@ static int damon_young_pmd_entry(pmd_t *pmd, unsigned long addr, 
	if (!folio)

		goto out;

	if (pte_young(*pte) || !folio_test_idle(folio) ||

			mmu_notifier_test_young(walk->mm, addr)) {

		*priv->folio_sz = folio_size(folio);

			mmu_notifier_test_young(walk->mm, addr))

		priv->young = true;

	}

	*priv->folio_sz = folio_size(folio);

	folio_put(folio);

out:

	pte_unmap_unlock(pte, ptl);
@@ -504,10 +502,9 @@ static int damon_young_hugetlb_entry(pte_t *pte, unsigned long hmask, 
	folio_get(folio);



	if (pte_young(entry) || !folio_test_idle(folio) ||

	    mmu_notifier_test_young(walk->mm, addr)) {

		*priv->folio_sz = huge_page_size(h);

	    mmu_notifier_test_young(walk->mm, addr))

		priv->young = true;

	}

	*priv->folio_sz = huge_page_size(h);



	folio_put(folio);