Re: [PATCH 03/10] mm: vmscan: Flatten kswapd priority loop

[Mel Gorman]

On Wed, Apr 10, 2013 at 04:47:31PM +0900, Kamezawa Hiroyuki wrote:
> > @@ -2811,8 +2814,16 @@ loop_again:
> >   
> >   			if ((buffer_heads_over_limit && is_highmem_idx(i)) ||
> >   			    !zone_balanced(zone, testorder,
> > -					   balance_gap, end_zone))
> > -				kswapd_shrink_zone(zone, &sc, lru_pages);
> > +					   balance_gap, end_zone)) {
> > +				/*
> > +				 * There should be no need to raise the
> > +				 * scanning priority if enough pages are
> > +				 * already being scanned that high
> > +				 * watermark would be met at 100% efficiency.
> > +				 */
> > +				if (kswapd_shrink_zone(zone, &sc, lru_pages))
> > +					raise_priority = false;
> 
> priority will be raised up enough to scan the amount of "high" watermark
> and will not get larger than that if some pages are reclaimed ?
> 

Yes.

-- 
Mel Gorman
SUSE Labs
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