C++ (Cpp) vtballoon_alloc_page Examples

Example #1

File: virtio_balloon.c Project: FreeBSDFoundation/freebsd

static void
vtballoon_inflate(struct vtballoon_softc *sc, int npages)
{
	struct virtqueue *vq;
	vm_page_t m;
	int i;

	vq = sc->vtballoon_inflate_vq;

	if (npages > VTBALLOON_PAGES_PER_REQUEST)
		npages = VTBALLOON_PAGES_PER_REQUEST;

	for (i = 0; i < npages; i++) {
		if ((m = vtballoon_alloc_page(sc)) == NULL) {
			sc->vtballoon_timeout = VTBALLOON_LOWMEM_TIMEOUT;
			break;
		}

		sc->vtballoon_page_frames[i] =
		    VM_PAGE_TO_PHYS(m) >> VIRTIO_BALLOON_PFN_SHIFT;

		KASSERT(m->queue == PQ_NONE,
		    ("%s: allocated page %p on queue", __func__, m));
		TAILQ_INSERT_TAIL(&sc->vtballoon_pages, m, plinks.q);
	}

	if (i > 0)
		vtballoon_send_page_frames(sc, vq, i);
}

Example #2

File: virtio_balloon.c Project: ppaeps/freebsd-head

static void
vtballoon_inflate(struct vtballoon_softc *sc, int npages)
{
	struct virtqueue *vq;
	vm_page_t m;
	int i;

	vq = sc->vtballoon_inflate_vq;
	m = NULL;

	if (npages > VTBALLOON_PAGES_PER_REQUEST)
		npages = VTBALLOON_PAGES_PER_REQUEST;
	KASSERT(npages > 0, ("balloon doesn't need inflating?"));

	for (i = 0; i < npages; i++) {
		if ((m = vtballoon_alloc_page(sc)) == NULL)
			break;

		sc->vtballoon_page_frames[i] =
		    VM_PAGE_TO_PHYS(m) >> VIRTIO_BALLOON_PFN_SHIFT;

		KASSERT(m->queue == PQ_NONE, ("allocated page on queue"));
		TAILQ_INSERT_TAIL(&sc->vtballoon_pages, m, pageq);
	}

	if (i > 0)
		vtballoon_send_page_frames(sc, vq, i);

	if (m == NULL)
		sc->vtballoon_timeout = VTBALLOON_LOWMEM_TIMEOUT;
}