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From: bugzilla@dpdk.org
To: dev@dpdk.org
Subject: [Bug 1144] virtio may lost pkts when pmd rxq less than
virtio-max_queue_pairs
Date: Thu, 08 Dec 2022 14:25:41 +0000
X-Bugzilla-Reason: AssignedTo
X-Bugzilla-Type: new
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X-Bugzilla-Product: DPDK
X-Bugzilla-Component: vhost/virtio
X-Bugzilla-Version: 22.11
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X-Bugzilla-Severity: major
X-Bugzilla-Who: 1031265646@qq.com
X-Bugzilla-Status: UNCONFIRMED
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https://bugs.dpdk.org/show_bug.cgi?id=3D1144
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: 1031265646@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 onl=
y 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 pk=
ts
send to the other 2 unused rxqs will never be consumed.
--=20
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