POOL_CACHE_ITEM_NITEMS
pp->pr_cache_nitems -= POOL_CACHE_ITEM_NITEMS(pl);
pp->pr_cache_nitems += POOL_CACHE_ITEM_NITEMS(ci);
pc->pc_nactv = POOL_CACHE_ITEM_NITEMS(ci) - 1;
pp->pr_cache_nitems -= POOL_CACHE_ITEM_NITEMS(pl);