mirror of
https://git.proxmox.com/git/qemu-server
synced 2025-08-05 16:40:34 +00:00
089aed811d
Quoting from QEMU commit 4271f40383 ("virtio-net: correctly report
maximum tx_queue_size value"):
> Maximum value for tx_queue_size depends on the backend type.
> 1024 for vDPA/vhost-user, 256 for all the others.
> So the parameter is silently ignored and ethtool reports a different
> value than the one provided by the user.
Indeed, for a non-vDPA/vhost-user netdev, the guest will see TX: 256
instead of the specified 1024 here. With the mentioned QEMU commit (in
master and will be part of 8.1), using 1024 will be a hard error:
> Invalid tx_queue_size (= 1024), must be a power of 2 between 256 and 256
Since neither vhost-user, nor vhost-vdpa netdev types are exposed by
Proxmox VE, just changing the limit to the correct 256 should be fine.
No obvious issue during live-migration found.
Fixes: 620d6b32 ("virtio-net: increase defaults rx|tx-queue-size to 1024")
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
27 lines
1.4 KiB
Batchfile
27 lines
1.4 KiB
Batchfile
/usr/bin/kvm \
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-id 8006 \
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-name 'netdev,debug-threads=on' \
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-no-shutdown \
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-chardev 'socket,id=qmp,path=/var/run/qemu-server/8006.qmp,server=on,wait=off' \
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-mon 'chardev=qmp,mode=control' \
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-chardev 'socket,id=qmp-event,path=/var/run/qmeventd.sock,reconnect=5' \
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-mon 'chardev=qmp-event,mode=control' \
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-pidfile /var/run/qemu-server/8006.pid \
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-daemonize \
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-smp '3,sockets=1,cores=3,maxcpus=3' \
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-nodefaults \
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-boot 'menu=on,strict=on,reboot-timeout=1000,splash=/usr/share/qemu-server/bootsplash.jpg' \
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-vnc 'unix:/var/run/qemu-server/8006.vnc,password=on' \
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-cpu kvm64,enforce,+kvm_pv_eoi,+kvm_pv_unhalt,+lahf_lm,+sep \
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-m 768 \
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-device 'pci-bridge,id=pci.1,chassis_nr=1,bus=pci.0,addr=0x1e' \
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-device 'pci-bridge,id=pci.2,chassis_nr=2,bus=pci.0,addr=0x1f' \
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-device 'piix3-usb-uhci,id=uhci,bus=pci.0,addr=0x1.0x2' \
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-device 'usb-tablet,id=tablet,bus=uhci.0,port=1' \
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-device 'VGA,id=vga,bus=pci.0,addr=0x2' \
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-device 'virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3,free-page-reporting=on' \
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-iscsi 'initiator-name=iqn.1993-08.org.debian:01:aabbccddeeff' \
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-netdev 'type=tap,id=net0,ifname=tap8006i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' \
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-device 'virtio-net-pci,mac=A2:C0:43:77:08:A0,netdev=net0,bus=pci.0,addr=0x12,id=net0,rx_queue_size=1024,tx_queue_size=256,bootindex=300,host_mtu=900' \
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-machine 'type=pc+pve0'
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