+ mm-memory-failurec-avoid-false-postive-pageswapcache-test.patch added to -mm tree

+ mm-memory-failurec-avoid-false-postive-pageswapcache-test.patch added to -mm tree

[Andrew Morton]

The patch titled
     Subject: mm/memory-failure.c: avoid false-postive PageSwapCache test
has been added to the -mm tree.  Its filename is
     mm-memory-failurec-avoid-false-postive-pageswapcache-test.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-memory-failurec-avoid-false-postive-pageswapcache-test.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-memory-failurec-avoid-false-postive-pageswapcache-test.patch

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------------------------------------------------------
From: Miaohe Lin <linmiaohe@huawei.com>
Subject: mm/memory-failure.c: avoid false-postive PageSwapCache test

Patch series "A few fixup and cleanup patches for memory failure".

This series contains a patch to fix false-postive PageSwapCache test,
minor cleanup for HWPoisonHandlable and try to dissolve truncated hugetlb
page.  More details can be found in the respective changelogs.


This patch (of 3):

PageSwapCache is only reliable when PageAnon is true because PG_swapcache
serves as PG_owner_priv_1 which can be used by fs if it's pagecache page. 
So we should test PageAnon to distinguish pagecache page from swapcache
page to avoid false-postive PageSwapCache test.

Link: https://lkml.kernel.org/r/20220407130352.15618-1-linmiaohe@huawei.com
Link: https://lkml.kernel.org/r/20220407130352.15618-2-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memory-failure.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/memory-failure.c~mm-memory-failurec-avoid-false-postive-pageswapcache-test
+++ a/mm/memory-failure.c
@@ -2262,7 +2262,7 @@ static int __soft_offline_page(struct pa
 		return 0;
 	}
 
-	if (!PageHuge(page) && PageLRU(page) && !PageSwapCache(page))
+	if (!PageHuge(page) && PageLRU(page) && !PageAnon(page))
 		/*
 		 * Try to invalidate first. This should work for
 		 * non dirty unmapped page cache pages.
_

Patches currently in -mm which might be from linmiaohe@huawei.com are

mm-mempolicy-fix-mpol_new-leak-in-shared_policy_replace.patch
mm-shmem-make-shmem_init-return-void.patch
mm-memcg-remove-unneeded-nr_scanned.patch
mm-mmapc-use-helper-mlock_future_check.patch
mm-mremap-use-helper-mlock_future_check.patch
mm-mremap-avoid-unneeded-do_munmap-call.patch
mm-memory-failurec-avoid-false-postive-pageswapcache-test.patch
mm-memory-failurec-minor-cleanup-for-hwpoisonhandlable.patch
mm-memory-failurec-dissolve-truncated-hugetlb-page.patch
mm-z3fold-declare-z3fold_mount-with-__init.patch
mm-z3fold-remove-obsolete-comment-in-z3fold_alloc.patch
mm-z3fold-minor-clean-up-for-z3fold_free.patch
mm-z3fold-remove-unneeded-page_mapcount_reset-and-clearpageprivate.patch
mm-z3fold-remove-confusing-local-variable-l-reassignment.patch
mm-z3fold-move-decrement-of-pool-pages_nr-into-__release_z3fold_page.patch
mm-z3fold-remove-redundant-list_del_init-of-zhdr-buddy-in-z3fold_free.patch
mm-z3fold-remove-unneeded-page_headless-check-in-free_handle.patch
mm-compaction-use-helper-isolation_suitable.patch
drivers-base-nodec-fix-compaction-sysfs-file-leak.patch
mm-migration-remove-unneeded-local-variable-mapping_locked.patch
mm-migration-remove-unneeded-out-label.patch
mm-migration-remove-unneeded-local-variable-page_lru.patch
mm-migration-fix-the-confusing-pagetranshuge-check.patch
mm-migration-use-helper-function-vma_lookup-in-add_page_for_migration.patch
mm-migration-use-helper-macro-min-in-do_pages_stat.patch
mm-migration-avoid-unneeded-nodemask_t-initialization.patch
mm-migration-remove-some-duplicated-codes-in-migrate_pages.patch
mm-migration-fix-potential-page-refcounts-leak-in-migrate_pages.patch
mm-migration-fix-potential-invalid-node-access-for-reclaim-based-migration.patch
mm-migration-fix-possible-do_pages_stat_array-racing-with-memory-offline.patch