https://bugs.dpdk.org/show_bug.cgi?id=1144
Bug ID: 1144
Summary: virtio may lost pkts when pmd rxq less than
virtio-max_queue_pairs
Product: DPDK
Version: 22.11
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: major
Priority: Normal
Component: vhost/virtio
Assignee: dev@dpdk.org
Reporter: 1031265...@qq.com
Target Milestone: ---
when virtio pmd starts, a virtio-func named modern_setup_queue will set rxq num
to hw. let's suppose 4 rxqs in hw-virtio. but a dpdk-process starts use only 2
rxqs, however hw doesn't aware this, pkts will send to 4 rxqs all the same, but
dpdk-process would only poll 2 rxqs which result to a pkts loss. cuz the pkts
send to the other 2 unused rxqs will never be consumed.
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