diff options
Diffstat (limited to 'drivers/vhost/net.c')
| -rw-r--r-- | drivers/vhost/net.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index edc6fec9ad84..986058a57917 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -44,6 +44,10 @@ MODULE_PARM_DESC(experimental_zcopytx, "Enable Zero Copy TX;" * Using this limit prevents one virtqueue from starving others. */ #define VHOST_NET_WEIGHT 0x80000 +/* Max number of packets transferred before requeueing the job. + * Using this limit prevents one virtqueue from starving rx. */ +#define VHOST_NET_PKT_WEIGHT(vq) ((vq)->num * 2) + /* MAX number of TX used buffers for outstanding zerocopy */ #define VHOST_MAX_PEND 128 #define VHOST_GOODCOPY_LEN 256 @@ -473,6 +477,7 @@ static void handle_tx(struct vhost_net *net) struct socket *sock; struct vhost_net_ubuf_ref *uninitialized_var(ubufs); bool zcopy, zcopy_used; + int sent_pkts = 0; mutex_lock(&vq->mutex); sock = vq->private_data; @@ -580,7 +585,8 @@ static void handle_tx(struct vhost_net *net) else vhost_zerocopy_signal_used(net, vq); vhost_net_tx_packet(net); - if (unlikely(total_len >= VHOST_NET_WEIGHT)) { + if (unlikely(total_len >= VHOST_NET_WEIGHT) || + unlikely(++sent_pkts >= VHOST_NET_PKT_WEIGHT(vq))) { vhost_poll_queue(&vq->poll); break; } |