On 12/08/2017 02:30 AM, Tiwei Bie wrote: > On Thu, Dec 07, 2017 at 04:00:57PM +0000, Kevin Traynor wrote: >> On 12/07/2017 05:30 AM, Tiwei Bie wrote: >>> The vector Rx will be broken if backend has consumed all >>> the descs in the avail ring before the device is started. >>> Because in current implementation, vector Rx will return >>> immediately without refilling the avail ring if the used >>> ring is empty. So we have to refill the avail ring after >>> flushing the elements in the used ring for vector Rx. >>> >>> Besides, vector Rx has a different ring layout assumption >>> and mbuf management. So we need to handle it differently. >>> >> >> Hi Tiwei, does the issue only occur with the vector rx? How about if the >> simple rx is used because VIRTIO_NET_F_MRG_RXBUF is set? > > Hi Kevin, > > Yes, you are right! The issue only occurs with the vector > Rx. The vector Rx (i.e. the simple Rx) won't be used if > VIRTIO_NET_F_MRG_RXBUF is set. > > Best regards, > Tiwei Bie >
Thanks for clarifying this Tiwei, Kevin.