Re: [PATCH v3 5/6] mm/gup: migrate pinned pages out of movable zone

[Jason Gunthorpe]

On Fri, Dec 11, 2020 at 03:21:39PM -0500, Pavel Tatashin wrote:
> @@ -1593,7 +1592,7 @@ static long check_and_migrate_cma_pages(struct mm_struct *mm,
>  				}
>  
>  				if (!isolate_lru_page(head)) {
> -					list_add_tail(&head->lru, &cma_page_list);
> +					list_add_tail(&head->lru, &movable_page_list);
>  					mod_node_page_state(page_pgdat(head),
>  							    NR_ISOLATED_ANON +
>  							    page_is_file_lru(head),
> @@ -1605,7 +1604,7 @@ static long check_and_migrate_cma_pages(struct mm_struct *mm,
>  		i += step;
>  	}
>  
> -	if (!list_empty(&cma_page_list)) {
> +	if (!list_empty(&movable_page_list)) {

You didn't answer my earlier question, is it OK that ZONE_MOVABLE
pages leak out here if ioslate_lru_page() fails but the
moval_page_list is empty? 

I think the answer is no, right?

Jason