> @@ -715,13 +725,7 @@ unlock:
quoted text
>   		 * restored.
>   		 */
>   		list_del(&page->lru);
> -		if (!page->mapping) {
> -			VM_BUG_ON(page_count(page) != 1);
> -			unlock_page(page);
> -			put_page(page);		/* just free the old page */
> -			goto end_migration;
> -		} else
> -			unlock = putback_lru_page(page);
> +		unlock = putback_lru_page(page);
>  	}
>  
>  	if (unlock)

this part is really necessary?
I tryed to remove it, but any problem doesn't happend.

Of cource, another part is definitly necessary for specurative pagecache :)




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