C++ (Cpp) check_classzone_need_balance 예제들

예제 #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;
		debug_lock_break(0);
#ifndef CONFIG_PREEMPT
		if (unlikely(current->need_resched))
			schedule();
#endif
		if (!zone->need_balance)
			continue;
		if (!try_to_free_pages(zone, GFP_KSWAPD, 0)) {
			zone->need_balance = 0;
			__set_current_state(TASK_INTERRUPTIBLE);
			schedule_timeout(HZ);
			continue;
		}
		if (check_classzone_need_balance(zone))
			need_more_balance = 1;
		else
			zone->need_balance = 0;
	}

	return need_more_balance;
}

예제 #2

파일: vmscan.c 프로젝트: 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;
}

예제 #3

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;
}

예제 #4

파일: vmscan.c 프로젝트: rohankataria/linuxScheduler

int try_to_free_pages_zone(zone_t *classzone, unsigned int gfp_mask)
{
	gfp_mask = pf_gfp_mask(gfp_mask);

	for (;;) {
		int tries = vm_passes;
		int failed_swapout = !(gfp_mask & __GFP_IO);
		int nr_pages = SWAP_CLUSTER_MAX;

		do {
			nr_pages = shrink_caches(classzone, gfp_mask, nr_pages, &failed_swapout);
			if (nr_pages <= 0)
				return 1;
			shrink_dcache_memory(vm_vfs_scan_ratio, gfp_mask);
			shrink_icache_memory(vm_vfs_scan_ratio, gfp_mask);
#ifdef CONFIG_QUOTA
			shrink_dqcache_memory(vm_vfs_scan_ratio, gfp_mask);
#endif
			if (!failed_swapout)
				failed_swapout = !swap_out(classzone);
		} while (--tries);

#ifdef	CONFIG_OOM_KILLER
	out_of_memory();
#else
	if (likely(current->pid != 1))
		break;
	if (!check_classzone_need_balance(classzone))
		break;

	__set_current_state(TASK_RUNNING);
	yield();
#endif
	}

	return 0;
}