Re: [PATCH v7 2/2] mm/memory-failure: teach kill_accessing_process to accept hugetlb tail page pfn

[Harry Yoo]

On Tue, Jan 20, 2026 at 04:22:34PM -0700, Jane Chu wrote:
> When a hugetlb folio is being poisoned again, try_memory_failure_hugetlb()
> passed head pfn to kill_accessing_process(), that is not right.
> The precise pfn of the poisoned page should be used in order to
> determine the precise vaddr as the SIGBUS payload.
> 
> This issue has already been taken care of in the normal path, that is,
> hwpoison_user_mappings(), see [1][2].  Further more, for [3] to work
> correctly in the hugetlb repoisoning case, it's essential to inform
> VM the precise poisoned page, not the head page.
> 
> [1] https://lkml.kernel.org/r/20231218135837.3310403-1-willy@xxxxxxxxxxxxx
> [2] https://lkml.kernel.org/r/20250224211445.2663312-1-jane.chu@xxxxxxxxxx
> [3] https://lore.kernel.org/lkml/20251116013223.1557158-1-jiaqiyan@xxxxxxxxxx/
> 
> Cc: <stable@xxxxxxxxxxxxxxx>
> Signed-off-by: Jane Chu <jane.chu@xxxxxxxxxx>
> Reviewed-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
> Acked-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
> ---

FWIW, looks good to me,
Reviewed-by: Harry Yoo <harry.yoo@xxxxxxxxxx>

-- 
Cheers,
Harry / Hyeonggon