From: Yunjian Wang <wangyunj...@huawei.com> In kni_allocate_mbufs(), we alloc mbuf for alloc_q as this code. allocq_free = (kni->alloc_q->read - kni->alloc_q->write - 1) \ & (MAX_MBUF_BURST_NUM - 1); The value of allocq_free maybe zero (e.g 32 & (32 - 1) = 0), and it will not fill the alloc_q. When the alloc_q's free count is zero, it will drop the packet in kernel kni.
In this patch, we set the allocq_free as the min between MAX_MBUF_BURST_NUM and the free count of the alloc_q. Signed-off-by: Cheng Liu <liuchen...@huawei.com> Signed-off-by: Yunjian Wang <wangyunj...@huawei.com> --- lib/kni/rte_kni.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/lib/kni/rte_kni.c b/lib/kni/rte_kni.c index 9dae6a8d7c..20d8f20cef 100644 --- a/lib/kni/rte_kni.c +++ b/lib/kni/rte_kni.c @@ -677,8 +677,9 @@ kni_allocate_mbufs(struct rte_kni *kni) return; } - allocq_free = (kni->alloc_q->read - kni->alloc_q->write - 1) - & (MAX_MBUF_BURST_NUM - 1); + allocq_free = kni_fifo_free_count(kni->alloc_q); + allocq_free = (allocq_free > MAX_MBUF_BURST_NUM) ? + MAX_MBUF_BURST_NUM : allocq_free; for (i = 0; i < allocq_free; i++) { pkts[i] = rte_pktmbuf_alloc(kni->pktmbuf_pool); if (unlikely(pkts[i] == NULL)) { -- 2.23.0