On Mon, Nov 01, 2021 at 12:48:56PM -0700, Yang Shi wrote:
> commit c7cb42e94473aafe553c0f2a3d8ca904599399ed upstream.
>
> When handling THP hwpoison checked if the THP is in allocation or free
> stage since hwpoison may mistreat it as hugetlb page. After commit
> 415c64c1453a ("mm/memory-failure: split thp earlier in memory error
> handling") the problem has been fixed, so this check is no longer
> needed. Remove it. The side effect of the removal is hwpoison may
> report unsplit THP instead of unknown error for shmem THP. It seems not
> like a big deal.
>
> The following patch "mm: filemap: check if THP has hwpoisoned subpage
> for PMD page fault" depends on this, which fixes shmem THP with
> hwpoisoned subpage(s) are mapped PMD wrongly. So this patch needs to be
> backported to -stable as well.
>
> Link: https://lkml.kernel.org/r/20211020210755.23964-2-shy828301@xxxxxxxxx
> Signed-off-by: Yang Shi <shy828301@xxxxxxxxx>
> Suggested-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
> 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>
> Cc: <stable@xxxxxxxxxxxxxxx>
> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
> ---
> mm-filemap-check-if-thp-has-hwpoisoned-subpage-for-pmd-page-fault.patch
> depends on this one.
Both now queued up, thanks.
greg k-h
