+ mm-replace-multiple-dcache-flush-with-flush_dcache_folio.patch added to -mm tree

* + mm-replace-multiple-dcache-flush-with-flush_dcache_folio.patch added to -mm tree
@ 2022-02-08 21:15 Andrew Morton
  0 siblings, 0 replies; 3+ messages in thread
From: Andrew Morton @ 2022-02-08 21:15 UTC (permalink / raw)
  To: mm-commits, ziy, willy, rientjes, mike.kravetz, lars.persson,
	kirill.shutemov, duanxiongchun, almasrymina, songmuchun, akpm


The patch titled
     Subject: mm: replace multiple dcache flush with flush_dcache_folio()
has been added to the -mm tree.  Its filename is
     mm-replace-multiple-dcache-flush-with-flush_dcache_folio.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-replace-multiple-dcache-flush-with-flush_dcache_folio.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-replace-multiple-dcache-flush-with-flush_dcache_folio.patch

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------------------------------------------------------
From: Muchun Song <songmuchun@bytedance.com>
Subject: mm: replace multiple dcache flush with flush_dcache_folio()

Simplify the code by using flush_dcache_folio().

Link: https://lkml.kernel.org/r/20220208073617.70342-6-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Lars Persson <lars.persson@axis.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Mina Almasry <almasrymina@google.com>
Cc: Xiongchun Duan <duanxiongchun@bytedance.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/migrate.c |    8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

--- a/mm/migrate.c~mm-replace-multiple-dcache-flush-with-flush_dcache_folio
+++ a/mm/migrate.c
@@ -916,12 +916,8 @@ static int move_to_new_page(struct page
 		if (!PageMappingFlags(page))
 			page->mapping = NULL;
 
-		if (likely(!is_zone_device_page(newpage))) {
-			int i, nr = compound_nr(newpage);
-
-			for (i = 0; i < nr; i++)
-				flush_dcache_page(newpage + i);
-		}
+		if (likely(!is_zone_device_page(newpage)))
+			flush_dcache_folio(page_folio(newpage));
 	}
 out:
 	return rc;
_

Patches currently in -mm which might be from songmuchun@bytedance.com are

mm-thp-fix-wrong-cache-flush-in-remove_migration_pmd.patch
mm-fix-missing-cache-flush-for-all-tail-pages-of-compound-page.patch
mm-hugetlb-fix-missing-cache-flush-in-copy_huge_page_from_user.patch
mm-hugetlb-fix-missing-cache-flush-in-hugetlb_mcopy_atomic_pte.patch
mm-replace-multiple-dcache-flush-with-flush_dcache_folio.patch
mm-hugetlb-free-the-2nd-vmemmap-page-associated-with-each-hugetlb-page.patch
mm-hugetlb-replace-hugetlb_free_vmemmap_enabled-with-a-static_key.patch
mm-sparsemem-use-page-table-lock-to-protect-kernel-pmd-operations.patch
selftests-vm-add-a-hugetlb-test-case.patch
mm-sparsemem-move-vmemmap-related-to-hugetlb-to-config_hugetlb_page_free_vmemmap.patch


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