Re: [PATCH] mm/madvise: fix madvise_pageout for private file mappings

[David Hildenbrand]

> +	 * If the VMA belongs to a private file mapping, there can be private
> +	 * dirty pages which can be paged out if even this process is neither
> +	 * owner nor write capable of the file. Cache the file access check
> +	 * here and use it later during page walk.
> +	 */
> +	can_pageout_file = can_do_file_pageout(vma);

Why not move that into madvise_pageout_page_range() ? Avoids passing 
this variable to that function.

In fact, why not even call that function directly instead of storing 
that in madvise_walk_private(). The function is extremely lightweight.

>   
>   	lru_add_drain();
>   	tlb_gather_mmu(&tlb, mm);
> -	madvise_pageout_page_range(&tlb, vma, start_addr, end_addr);
> +	madvise_pageout_page_range(&tlb, vma, start_addr, end_addr, can_pageout_file);
>   	tlb_finish_mmu(&tlb);
>   
>   	return 0;

--
Thanks,

David / dhildenb