| 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. |
| _ |
