Re: [PATCH 02/11] mm: Call ctor/dtor for kernel PTEs

Kevin Brodsky
2025-03-24T08:38:59Z

On 17/03/2025 15:16, Kevin Brodsky wrote:
> diff --git a/include/asm-generic/pgalloc.h b/include/asm-generic/pgalloc.h
> index e164ca66f0f6..3c8ec3bfea44 100644
> --- a/include/asm-generic/pgalloc.h
> +++ b/include/asm-generic/pgalloc.h
> @@ -23,6 +23,11 @@ static inline pte_t *__pte_alloc_one_kernel_noprof(struct mm_struct *mm)
>
> if (!ptdesc)
> return NULL;
> + if (!pagetable_pte_ctor(mm, ptdesc)) {

As reported by the CI [1], this can cause trouble on x86 because dtor
calls are missing in pud_free_pmd_page() and pmd_free_pte_page(). Will
fix in the next version.

- Kevin

[1] https://lore.kernel.org/oe-lkp/202503211612.e11bd73f-lkp@intel.com/