static unsigned int update_balloon_stats()

in virtio_balloon.c [321:359]

• 35 lines of code
• 1 McCabe index (conditional complexity)

static unsigned int update_balloon_stats(struct virtio_balloon *vb)
{
	unsigned long events[NR_VM_EVENT_ITEMS];
	struct sysinfo i;
	unsigned int idx = 0;
	long available;
	unsigned long caches;

	all_vm_events(events);
	si_meminfo(&i);

	available = si_mem_available();
	caches = global_node_page_state(NR_FILE_PAGES);

#ifdef CONFIG_VM_EVENT_COUNTERS
	update_stat(vb, idx++, VIRTIO_BALLOON_S_SWAP_IN,
				pages_to_bytes(events[PSWPIN]));
	update_stat(vb, idx++, VIRTIO_BALLOON_S_SWAP_OUT,
				pages_to_bytes(events[PSWPOUT]));
	update_stat(vb, idx++, VIRTIO_BALLOON_S_MAJFLT, events[PGMAJFAULT]);
	update_stat(vb, idx++, VIRTIO_BALLOON_S_MINFLT, events[PGFAULT]);
#ifdef CONFIG_HUGETLB_PAGE
	update_stat(vb, idx++, VIRTIO_BALLOON_S_HTLB_PGALLOC,
		    events[HTLB_BUDDY_PGALLOC]);
	update_stat(vb, idx++, VIRTIO_BALLOON_S_HTLB_PGFAIL,
		    events[HTLB_BUDDY_PGALLOC_FAIL]);
#endif
#endif
	update_stat(vb, idx++, VIRTIO_BALLOON_S_MEMFREE,
				pages_to_bytes(i.freeram));
	update_stat(vb, idx++, VIRTIO_BALLOON_S_MEMTOT,
				pages_to_bytes(i.totalram));
	update_stat(vb, idx++, VIRTIO_BALLOON_S_AVAIL,
				pages_to_bytes(available));
	update_stat(vb, idx++, VIRTIO_BALLOON_S_CACHES,
				pages_to_bytes(caches));

	return idx;
}