[dpdk-dev] [PATCH] lib/librte_pmd_virtio fix can't receive packets after rx_q is empty
linhaifeng
haifeng.lin at huawei.com
Fri Mar 20 11:46:23 CET 2015
From: Linhaifeng <haifeng.lin at huawei.com>
If failed to alloc mbuf ring_size times the rx_q may be empty and can't
receive any packets forever because nb_used is 0 forever.
so we should try to refill when nb_used is 0.After otherone free mbuf
we can restart to receive packets.
Signed-off-by: Linhaifeng <haifeng.lin at huawei.com>
---
lib/librte_pmd_virtio/virtio_rxtx.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/lib/librte_pmd_virtio/virtio_rxtx.c b/lib/librte_pmd_virtio/virtio_rxtx.c
index 1d74b34..5c7e0cd 100644
--- a/lib/librte_pmd_virtio/virtio_rxtx.c
+++ b/lib/librte_pmd_virtio/virtio_rxtx.c
@@ -495,7 +495,7 @@ virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
num = num - ((rxvq->vq_used_cons_idx + num) % DESC_PER_CACHELINE);
if (num == 0)
- return 0;
+ goto refill;
num = virtqueue_dequeue_burst_rx(rxvq, rcv_pkts, len, num);
PMD_RX_LOG(DEBUG, "used:%d dequeue:%d", nb_used, num);
@@ -536,6 +536,7 @@ virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
rxvq->packets += nb_rx;
+refill:
/* Allocate new mbuf for the used descriptor */
error = ENOSPC;
while (likely(!virtqueue_full(rxvq))) {
--
1.8.5.2.msysgit.0
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