The patch titled
Subject: mm: hwpoison: handle non-anonymous THP correctly
has been added to the -mm tree. Its filename is
mm-hwpoison-handle-non-anonymous-thp-correctly.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-hwpoison-handle-non-anonymous-thp-correctly.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-hwpoison-handle-non-anonymous-thp-correctly.patch
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------------------------------------------------------
From: Yang Shi <shy828301@xxxxxxxxx>
Subject: mm: hwpoison: handle non-anonymous THP correctly
Currently hwpoison doesn't handle non-anonymous THP, but since v4.8 THP
support for tmpfs and read-only file cache has been added. They could be
offlined by split THP, just like anonymous THP.
Link: https://lkml.kernel.org/r/20211014191615.6674-7-shy828301@xxxxxxxxx
Signed-off-by: Yang Shi <shy828301@xxxxxxxxx>
Acked-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory-failure.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
--- a/mm/memory-failure.c~mm-hwpoison-handle-non-anonymous-thp-correctly
+++ a/mm/memory-failure.c
@@ -1444,14 +1444,11 @@ static int identify_page_state(unsigned
static int try_to_split_thp_page(struct page *page, const char *msg)
{
lock_page(page);
- if (!PageAnon(page) || unlikely(split_huge_page(page))) {
+ if (unlikely(split_huge_page(page))) {
unsigned long pfn = page_to_pfn(page);
unlock_page(page);
- if (!PageAnon(page))
- pr_info("%s: %#lx: non anonymous thp\n", msg, pfn);
- else
- pr_info("%s: %#lx: thp split failed\n", msg, pfn);
+ pr_info("%s: %#lx: thp split failed\n", msg, pfn);
put_page(page);
return -EBUSY;
}
_
Patches currently in -mm which might be from shy828301@xxxxxxxxx are
mm-hwpoison-remove-the-unnecessary-thp-check.patch
mm-filemap-check-if-thp-has-hwpoisoned-subpage-for-pmd-page-fault.patch
mm-filemap-coding-style-cleanup-for-filemap_map_pmd.patch
mm-hwpoison-refactor-refcount-check-handling.patch
mm-shmem-dont-truncate-page-if-memory-failure-happens.patch
mm-hwpoison-handle-non-anonymous-thp-correctly.patch
mm-migrate-make-demotion-knob-depend-on-migration.patch
