Re: [PATCH] mm: Implement swap prefetching

[Mattia Dongili <malattia@linux.it>]

Hello Con,

On Tue, Feb 21, 2006 at 12:44:51AM +1100, Con Kolivas wrote:
> Unchanged heavily tested v27 implementation of swap prefetching resynced with
> 2.6.16-rc4-mm1.

I used your patches in the last 2 or 3 -mm kernels (since s-p-v24). It's
been working good until now.

> Please consider for -mm.

Just one minor note:
[...]
> Index: linux-2.6.16-rc4-mm1/mm/swap.c
> ===================================================================
> --- linux-2.6.16-rc4-mm1.orig/mm/swap.c	2006-02-21 00:38:56.000000000 +1100
> +++ linux-2.6.16-rc4-mm1/mm/swap.c	2006-02-21 00:39:25.000000000 +1100
> @@ -384,6 +384,46 @@ void __pagevec_lru_add_active(struct pag
>  	pagevec_reinit(pvec);
>  }
>  
> +static inline void __pagevec_lru_add_tail(struct pagevec *pvec)
> +{
> +	int i;
> +	struct zone *zone = NULL;
> +
> +	for (i = 0; i < pagevec_count(pvec); i++) {
> +		struct page *page = pvec->pages[i];
> +		struct zone *pagezone = page_zone(page);
> +
> +		if (pagezone != zone) {
> +			if (zone)
> +				spin_unlock_irq(&zone->lru_lock);
> +			zone = pagezone;
> +			spin_lock_irq(&zone->lru_lock);
> +		}
> +		if (TestSetPageLRU(page))
> +			BUG();

TestSetPageLRU is gone in -mm (see mm-pagelru-no-testset.patch), you
should probably change it to

		BUG_ON(PageLRU(page));
		SetPageLRU(page);

ciao
-- 
mattia
:wq!
-
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