On Tue, Oct 15, 2019 at 9:00 PM Flavio Leitner <f...@sysclose.org> wrote:
> diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
> index 5b85b832d..da69ab1db 100644
> --- a/lib/librte_vhost/virtio_net.c
> +++ b/lib/librte_vhost/virtio_net.c
> @@ -1289,6 +1289,93 @@ get_zmbuf(struct vhost_virtqueue *vq)
> return NULL;
> }
>
> +static void
> +virtio_dev_extbuf_free(void *addr __rte_unused, void *opaque)
> +{
> + rte_free(opaque);
> +}
> +
> +static int
> +virtio_dev_extbuf_alloc(struct rte_mbuf *pkt, uint32_t size)
> +{
> + struct rte_mbuf_ext_shared_info *shinfo = NULL;
> + uint32_t total_len = RTE_PKTMBUF_HEADROOM + size;
> + uint16_t buf_len;
> + rte_iova_t iova;
> + void *buf;
> +
> + /* Try to use pkt buffer to store shinfo to reduce the amount of
> memory
> + * required, otherwise store shinfo in the new buffer.
> + */
> + if (rte_pktmbuf_tailroom(pkt) >= sizeof(*shinfo))
> + shinfo = rte_pktmbuf_mtod(pkt,
> + struct rte_mbuf_ext_shared_info *);
> + else {
> + total_len += sizeof(*shinfo) + sizeof(uintptr_t);
> + total_len = RTE_ALIGN_CEIL(total_len, sizeof(uintptr_t));
> + }
> +
> + if (unlikely(total_len > UINT16_MAX))
> + return -ENOSPC;
> +
> + buf_len = total_len;
> + buf = rte_malloc(NULL, buf_len, RTE_CACHE_LINE_SIZE);
Using rte_malloc() means that the allocation can end up on any numa node.
This external buffer might end up on a different node than the mbuf
(which resides on mp->socket_id node).
--
David Marchand
