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

[David Hildenbrand (Red Hat)]

On 12/19/25 07:28, 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.

I don't think so? IIRC, for hugetlb folios we always reported the head 
PFN. And user space must assume that the whole thing is poisoned and 
will go away.

I recall that older QEMU even depended on that behavior, for example.

--
Cheers

David