Re: [PATCH v8 05/15] guest_memfd: Use folio_has_hwpoisoned_page()

On 7/31/2026 1:07 PM, Matthew Wilcox (Oracle) wrote:
> folio_test_hwpoison() only works on hugetlb folios today and will give 
> the wrong answer for other large folios. folio_has_hwpoisoned_page() 
> works on both. Signed-off-by: Matthew Wilcox (Oracle) <willy@  
> infradead. org> Acked-by: Sean Christopherson
> 
> 
> folio_test_hwpoison() only works on hugetlb folios today and will give
> the wrong answer for other large folios.  folio_has_hwpoisoned_page()
> works on both.
> 
> Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
> Acked-by: Sean Christopherson <[email protected]>
> Reviewed-by: Ackerley Tng <[email protected]>
> Reviewed-by: Gregory Price <[email protected]>
> ---
>   virt/kvm/guest_memfd.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/virt/kvm/guest_memfd.c b/virt/kvm/guest_memfd.c
> index db57c5766ab6..94eedcc7f1a9 100644
> --- a/virt/kvm/guest_memfd.c
> +++ b/virt/kvm/guest_memfd.c
> @@ -774,7 +774,7 @@ static struct folio *__kvm_gmem_get_pfn(struct file *file,
>   	if (IS_ERR(folio))
>   		return folio;
>   
> -	if (folio_test_hwpoison(folio)) {
> +	if (folio_has_hwpoisoned_page(folio)) {
>   		folio_unlock(folio);
>   		folio_put(folio);
>   		return ERR_PTR(-EHWPOISON);
> -- 
> 2.47.3
> 

Reviewed-by: Jane Chu <[email protected]>

thanks,
-jane