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Nick Piggin wrote:
>>@@ -714,14 +737,27 @@ shrink_zone(struct zone *zone, int max_s
> * just to make sure that the kernel will slowly sift through the
> * active list.
> */
>- ratio = (unsigned long)SWAP_CLUSTER_MAX * zone->nr_active /
>- ((zone->nr_inactive | 1) * 2);
>+ nr_active = zone->nr_active_mapped + zone->nr_active_unmapped;
>+ ratio = (unsigned long)SWAP_CLUSTER_MAX * nr_active /
>+ (zone->nr_inactive * 2 + 1);
>+ mapped_ratio = (unsigned long long)ratio * nr_active;
>+ do_div(mapped_ratio, zone->nr_active_mapped+1);
>
Just for information, this is where you would balance mapped vs unmapped
pages: do_div(mapped_ratio, 16); /* mapped pages are worth 16 times
more */
>+>+ ratio = ratio - mapped_ratio;>+ atomic_add(ratio+1, &zone->nr_scan_active_unmapped);
>+ count = atomic_read(&zone->nr_scan_active_unmapped);
>+ if (count >= SWAP_CLUSTER_MAX) {>+ atomic_set(&zone->nr_scan_active_unmapped, 0);
>+ shrink_active_list(zone, &zone->active_unmapped_list,
>+ &zone->nr_active_unmapped, count, ps);
>+ }> >- atomic_add(ratio+1, &zone->nr_scan_active);
>- count = atomic_read(&zone->nr_scan_active);
>+ atomic_add(mapped_ratio+1, &zone->nr_scan_active_mapped);
>+ count = atomic_read(&zone->nr_scan_active_mapped);
> if (count >= SWAP_CLUSTER_MAX) {
>- atomic_set(&zone->nr_scan_active, 0);
>- shrink_active_list(zone, &zone->active_list, count, ps);
>+ atomic_set(&zone->nr_scan_active_mapped, 0);
>+ shrink_active_list(zone, &zone->active_mapped_list,
>+ &zone->nr_active_mapped, count, ps);
> }
>
> atomic_add(max_scan, &zone->nr_scan_inactive);
>
>
>
-
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