On Tue, 21 Aug 2007, Mel Gorman wrote:

quoted text
> > @@ -1156,6 +1156,7 @@ unsigned long try_to_free_pages(struct z
> >  		.swappiness = vm_swappiness,
> >  		.order = order,
> >  	};
> > +	LIST_HEAD(laundry);
> 
> Why is the laundry not made part of the scan_control?

That is one possibility. The other is to treat laundry as a lru type list 
under zone->lru_lock. This would allow the writeback process (whichever 
that is) to be independent of the producer of the laundry. Dirty pages 
could be isolated from an atomic context.
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