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From: xuan <1877015@bugs.launchpad.net>
To: qemu-devel@nongnu.org
Subject: [Bug 1877015] [NEW] virtio only support packed ring size power of 2 between 256 and 1024
Date: Wed, 06 May 2020 02:43:28 -0000	[thread overview]
Message-ID: <158873300816.14142.15664636500998863138.malonedeb@gac.canonical.com> (raw)

Public bug reported:

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.

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1877015

Title:
  virtio only support packed ring size power of 2 between 256 and 1024

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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             reply	other threads:[~2020-05-06  2:51 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-06  2:43 xuan [this message]
2020-05-06  2:56 ` [Bug 1877015] Re: virtio only support packed ring size power of 2 xuan
2020-05-06  4:31 ` [Bug 1877015] [NEW] virtio only support packed ring size power of 2 between 256 and 1024 罗勇刚(Yonggang Luo)
2020-05-06  4:31   ` Yonggang Luo
2020-05-06  5:14   ` xuan
2020-05-06  5:11 ` [Bug 1877015] Re: virtio only support packed ring size power of 2 xuan
2021-05-06 13:34 ` Thomas Huth
2021-05-07  1:55 ` xuan
2021-05-11  5:38 ` Thomas Huth

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