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[Bug 1877015] Re: virtio only support packed ring size power of 2
From: |
xuan |
Subject: |
[Bug 1877015] Re: virtio only support packed ring size power of 2 |
Date: |
Fri, 07 May 2021 01:55:38 -0000 |
** Changed in: qemu
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/1877015
Title:
virtio only support packed ring size power of 2
Status in QEMU:
New
Bug description:
Issue discription:
When QEMU starts with "-device
virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=false,mrg_rxbuf=on,rx_queue_size=1025,tx_queue_size=1025,mq=on,vectors=15,packed=on"
It raises error: Invalid rx_queue_size (= 1025), must be a power of 2
between 256 and 1024
Analysis:
According to virtio1.1 spec, the packed queue size value does not have to be
a power of 2.
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