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qemu-server/test/cfg2cmd/q35-linux-hostpci-multifunction.conf.cmd
Fiona Ebner 089aed811d cfg2cmd: netdev: fix value for tx_queue_size
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>
2023-07-27 13:14:12 +02:00

37 lines
2.1 KiB
Batchfile

/usr/bin/kvm \
-id 8006 \
-name 'vm8006,debug-threads=on' \
-no-shutdown \
-chardev 'socket,id=qmp,path=/var/run/qemu-server/8006.qmp,server=on,wait=off' \
-mon 'chardev=qmp,mode=control' \
-chardev 'socket,id=qmp-event,path=/var/run/qmeventd.sock,reconnect=5' \
-mon 'chardev=qmp-event,mode=control' \
-pidfile /var/run/qemu-server/8006.pid \
-daemonize \
-smbios 'type=1,uuid=3dd750ce-d910-44d0-9493-525c0be4e687' \
-drive 'if=pflash,unit=0,format=raw,readonly=on,file=/usr/share/pve-edk2-firmware//OVMF_CODE.fd' \
-drive 'if=pflash,unit=1,id=drive-efidisk0,format=qcow2,file=/var/lib/vz/images/100/vm-100-disk-1.qcow2' \
-global 'ICH9-LPC.acpi-pci-hotplug-with-bridge-support=off' \
-smp '2,sockets=2,cores=1,maxcpus=2' \
-nodefaults \
-boot 'menu=on,strict=on,reboot-timeout=1000,splash=/usr/share/qemu-server/bootsplash.jpg' \
-vnc 'unix:/var/run/qemu-server/8006.vnc,password=on' \
-cpu kvm64,enforce,+kvm_pv_eoi,+kvm_pv_unhalt,+lahf_lm,+sep \
-m 512 \
-object 'memory-backend-ram,id=ram-node0,size=256M' \
-numa 'node,nodeid=0,cpus=0,memdev=ram-node0' \
-object 'memory-backend-ram,id=ram-node1,size=256M' \
-numa 'node,nodeid=1,cpus=1,memdev=ram-node1' \
-readconfig /usr/share/qemu-server/pve-q35-4.0.cfg \
-device 'vmgenid,guid=54d1c06c-8f5b-440f-b5b2-6eab1380e13d' \
-device 'usb-tablet,id=tablet,bus=ehci.0,port=1' \
-device 'vfio-pci,host=0000:f0:43.0,id=hostpci0.0,bus=pci.0,addr=0x10.0,multifunction=on' \
-device 'vfio-pci,host=0000:f0:43.1,id=hostpci0.1,bus=pci.0,addr=0x10.1' \
-device 'vfio-pci,host=1234:f0:43.1,id=hostpci1,bus=pci.0,addr=0x11' \
-device 'VGA,id=vga,bus=pcie.0,addr=0x1' \
-device 'virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3,free-page-reporting=on' \
-iscsi 'initiator-name=iqn.1993-08.org.debian:01:aabbccddeeff' \
-netdev 'type=tap,id=net0,ifname=tap8006i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' \
-device 'virtio-net-pci,mac=2E:01:68:F9:9C:87,netdev=net0,bus=pci.0,addr=0x12,id=net0,rx_queue_size=1024,tx_queue_size=256,bootindex=300' \
-machine 'type=q35+pve0'