> static bool shrink_zone(struct zone *zone, struct scan_control *sc,
> bool is_classzone)
> {
> + struct reclaim_state *reclaim_state = current->reclaim_state;
> unsigned long nr_reclaimed, nr_scanned;
> bool reclaimable = false;
>
> @@ -2318,16 +2357,22 @@ static bool shrink_zone(struct zone *zone, struct scan_control *sc,
>
> memcg = mem_cgroup_iter(root, NULL, &reclaim);
> do {
> - unsigned long lru_pages;
> + unsigned long lru_pages, scanned;
> struct lruvec *lruvec;
> int swappiness;
>
> lruvec = mem_cgroup_zone_lruvec(zone, memcg);
> swappiness = mem_cgroup_swappiness(memcg);
> + scanned = sc->nr_scanned;
>
> shrink_lruvec(lruvec, swappiness, sc, &lru_pages);
> zone_lru_pages += lru_pages;
>
> + if (memcg && is_classzone)
> + shrink_slab(sc->gfp_mask, zone_to_nid(zone),
> + memcg, sc->nr_scanned - scanned,
> + lru_pages);
> +
Looks sc->nr_reclaimed has to be updated for "limit reclaim".
Hillf
> /*
> * Direct reclaim and kswapd have to scan all memory
> * cgroups to fulfill the overall scan target for the
> @@ -2350,19 +2395,14 @@ static bool shrink_zone(struct zone *zone, struct scan_control *sc,
> * Shrink the slab caches in the same proportion that
> * the eligible LRU pages were scanned.
> */
> - if (global_reclaim(sc) && is_classzone) {
> - struct reclaim_state *reclaim_state;
> -
> - shrink_node_slabs(sc->gfp_mask, zone_to_nid(zone),
> - sc->nr_scanned - nr_scanned,
> - zone_lru_pages);
> -
> - reclaim_state = current->reclaim_state;
> - if (reclaim_state) {
> - sc->nr_reclaimed +=
> - reclaim_state->reclaimed_slab;
> - reclaim_state->reclaimed_slab = 0;
> - }
> + if (global_reclaim(sc) && is_classzone)
> + shrink_slab(sc->gfp_mask, zone_to_nid(zone), NULL,
> + sc->nr_scanned - nr_scanned,
> + zone_lru_pages);
> +
> + if (reclaim_state) {
> + sc->nr_reclaimed += reclaim_state->reclaimed_slab;
> + reclaim_state->reclaimed_slab = 0;
> }
>
> vmpressure(sc->gfp_mask, sc->target_mem_cgroup,
> --
> 1.7.10.4
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