On Fri, 25 Jul 2025 11:31:12 +0800 Jinjiang Tu <tujinjiang@huawei.com> wrote:

Hold PTL in hwpoison_hugetlb_range() to avoid operating on stale page, as
hwpoison_pte_range() have done.

Does this fix any known runtime issues?  Or is it expected to?

It doesn't. There is no known issues, PTL is expected to hold like PTE handling to avoid poissible issues.

So, there is no need to backport it.

In other words, do we have reason to backport this fix into earlier
kernels?