On 01/24/2018 01:01 PM, Michael S. Tsirkin wrote:
On Wed, Jan 24, 2018 at 10:50:27AM +0800, Wei Wang wrote: This will not DTRT in all cases. It's quite possible that host does not need the kick when ring is half full but does need it later when ring is full. You can kick at ring half full as optimization but you absolutely still must kick on ring full. Something like: if (vq->num_free == virtqueue_get_vring_size(vq) / 2 || vq->num_free <= 2)
Right. Would "if (vq->num_free < virtqueue_get_vring_size(vq) / 2" be better?
Best, Wei -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
