static int shrink_caches(zone_t * classzone, int priority, unsigned int gfp_mask, int nr_pages)
{
int chunk_size = nr_pages;
unsigned long ratio;
nr_pages -= kmem_cache_reap(gfp_mask);
if (nr_pages <= 0)
return 0;
nr_pages = chunk_size;
/* try to keep the active list 2/3 of the size of the cache */
ratio = (unsigned long) nr_pages * nr_active_pages / ((nr_inactive_pages + 1) * 2);
refill_inactive(ratio);
nr_pages = shrink_cache(nr_pages, classzone, gfp_mask, priority);
if (nr_pages <= 0)
return 0;
shrink_dcache_memory(priority, gfp_mask);
shrink_icache_memory(priority, gfp_mask);
#ifdef CONFIG_QUOTA
shrink_dqcache_memory(DEF_PRIORITY, gfp_mask);
#endif
return nr_pages;
}
const surface tminimap::get_image(const int w, const int h) const
{
if(!terrain_) {
return NULL;
}
if(terrain_ != terrain) {
#ifdef DEBUG_MINIMAP_CACHE
std::cerr << "\nFlush cache.\n";
#else
DBG_GUI_D << "Flushing the minimap cache.\n";
#endif
terrain = terrain_;
cache.clear();
}
const tkey key(w, h, map_data_);
tcache::iterator itor = cache.find(key);
if(itor != cache.end()) {
#ifdef DEBUG_MINIMAP_CACHE
std::cerr << '+';
#endif
itor->second.age++;
return itor->second.surf;
}
if(cache.size() >= cache_max_size) {
shrink_cache();
}
try
{
const gamemap map(boost::make_shared<terrain_type_data>(*terrain_), map_data_);
const surface surf = image::getMinimap(w, h, map, NULL);
cache.insert(std::make_pair(key, tvalue(surf)));
#ifdef DEBUG_MINIMAP_CACHE
std::cerr << '-';
#endif
return surf;
}
catch(incorrect_map_format_error& e)
{
ERR_CF << "Error while loading the map: " << e.message << '\n';
#ifdef DEBUG_MINIMAP_CACHE
std::cerr << 'X';
#endif
}
return NULL;
}
static int shrink_caches(zone_t * classzone, unsigned int gfp_mask, int nr_pages, int * failed_swapout)
{
nr_pages -= kmem_cache_reap(gfp_mask);
if (nr_pages <= 0)
goto out;
spin_lock(&pagemap_lru_lock);
refill_inactive(nr_pages, classzone);
nr_pages = shrink_cache(nr_pages, classzone, gfp_mask, failed_swapout);
out:
return nr_pages;
}
