Re: [patch 1/2] x86_64: pageattr use single list

[Jason Baron]

On Wed, 18 Jan 2006, Nick Piggin wrote:

> Use page->lru.next to implement the singly linked list of pages rather
> than the struct deferred_page which needs to be allocated and freed for
> each page.
> 
> Signed-off-by: Nick Piggin <npiggin@xxxxxxx>
> Acked-by: Andi Kleen <ak@xxxxxxx>
> 
> Index: linux-2.6/arch/x86_64/mm/pageattr.c
> ===================================================================

...

> +
> +	flush_map((dpage && !dpage->lru.next) ? (unsigned long)page_address(dpage) : 0);
> +	while (dpage) {
> +		__free_page(dpage);
> +		dpage = (struct page *)dpage->lru.next;
>  	} 
>  } 
>  

do you want to be touching a struct page that was just freed?

-Jason
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