C++ (Cpp) try_to_free_pages_zone Beispiele

Beispiel #1

static int kswapd_balance_pgdat(pg_data_t * pgdat)
{
	int need_more_balance = 0, i;
	zone_t * zone;

	for (i = pgdat->nr_zones-1; i >= 0; i--) {
		zone = pgdat->node_zones + i;
		if (unlikely(current->need_resched))
			schedule();
		if (!zone->need_balance)
			continue;
		if (!try_to_free_pages_zone(zone, GFP_KSWAPD)) {
			zone->need_balance = 0;
#ifndef CONFIG_CONTIGUOUS_PAGE_ALLOC /* we always want the memory now !! */
			__set_current_state(TASK_INTERRUPTIBLE);
			schedule_timeout(HZ);
#endif
			continue;
		}
		if (check_classzone_need_balance(zone))
			need_more_balance = 1;
		else
			zone->need_balance = 0;
	}

	return need_more_balance;
}

Beispiel #2

Datei: vmscan.c Projekt: rohankataria/linuxScheduler

static int kswapd_balance_pgdat(pg_data_t * pgdat)
{
	int need_more_balance = 0, i;
	zone_t * zone;

	for (i = pgdat->nr_zones-1; i >= 0; i--) {
		zone = pgdat->node_zones + i;
		if (unlikely(current->need_resched))
			schedule();
		if (!zone->need_balance || !zone->size)
			continue;
		if (!try_to_free_pages_zone(zone, GFP_KSWAPD)) {
			zone->need_balance = 0;
			__set_current_state(TASK_INTERRUPTIBLE);
			schedule_timeout(HZ*5);
			continue;
		}
		if (check_classzone_need_balance(zone))
			need_more_balance = 1;
		else
			zone->need_balance = 0;
	}

	return need_more_balance;
}

Beispiel #3

int try_to_free_pages(unsigned int gfp_mask)
{
	pg_data_t *pgdat;
	zonelist_t *zonelist;
	unsigned long pf_free_pages;
	int error = 0;

	pf_free_pages = current->flags & PF_FREE_PAGES;
	current->flags &= ~PF_FREE_PAGES;

	for_each_pgdat(pgdat) {
		zonelist = pgdat->node_zonelists + (gfp_mask & GFP_ZONEMASK);
		error |= try_to_free_pages_zone(zonelist->zones[0], gfp_mask);
	}

	current->flags |= pf_free_pages;
	return error;
}