diff options
Diffstat (limited to 'results/classifier/accel-gemma3:12b/kvm/1863333')
| -rw-r--r-- | results/classifier/accel-gemma3:12b/kvm/1863333 | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/results/classifier/accel-gemma3:12b/kvm/1863333 b/results/classifier/accel-gemma3:12b/kvm/1863333 new file mode 100644 index 00000000..86a346db --- /dev/null +++ b/results/classifier/accel-gemma3:12b/kvm/1863333 @@ -0,0 +1,73 @@ + +Assigning NVMe disk to a domain causes VFIO_MAP_DMA errors + +I'm seeing some errors when assigning my NVMe disk to qemu. This is the full command line: + + +/home/zippy/work/qemu/qemu.git/x86_64-softmmu/qemu-system-x86_64 \ +-name guest=fedora,debug-threads=on \ +-S \ +-object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-2-fedora/master-key.aes \ +-machine pc-i440fx-4.1,accel=kvm,usb=off,dump-guest-core=off \ +-cpu host \ +-m size=4194304k,slots=16,maxmem=1099511627776k \ +-overcommit mem-lock=off \ +-smp 4,sockets=1,dies=1,cores=2,threads=2 \ +-object iothread,id=iothread1 \ +-object iothread,id=iothread2 \ +-object iothread,id=iothread3 \ +-object iothread,id=iothread4 \ +-mem-prealloc \ +-mem-path /hugepages2M/libvirt/qemu/2-fedora \ +-numa node,nodeid=0,cpus=0,mem=4096 \ +-uuid 63840878-0deb-4095-97e6-fc444d9bc9fa \ +-no-user-config \ +-nodefaults \ +-chardev socket,id=charmonitor,fd=31,server,nowait \ +-mon chardev=charmonitor,id=monitor,mode=control \ +-rtc base=utc \ +-no-shutdown \ +-global PIIX4_PM.disable_s3=0 \ +-global PIIX4_PM.disable_s4=0 \ +-boot menu=on,strict=on \ +-device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 \ +-device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x4 \ +-device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 \ +-blockdev '{"driver":"file","filename":"/var/lib/libvirt/images/fedora.qcow2","node-name":"libvirt-2-storage","auto-read-only":true,"discard":"unmap"}' \ +-blockdev '{"node-name":"libvirt-2-format","read-only":false,"discard":"unmap","driver":"qcow2","file":"libvirt-2-storage","backing":null}' \ +-device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,device_id=drive-scsi0-0-0-0,drive=libvirt-2-format,id=scsi0-0-0-0,bootindex=1 \ +-blockdev '{"driver":"nvme","device":"0000:02:00.0","namespace":1,"node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}' \ +-blockdev '{"node-name":"libvirt-1-format","read-only":false,"driver":"raw","file":"libvirt-1-storage"}' \ +-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=libvirt-1-format,id=virtio-disk0 \ +-netdev tap,fd=33,id=hostnet0,vhost=on,vhostfd=34 \ +-device virtio-net-pci,host_mtu=9000,netdev=hostnet0,id=net0,mac=52:54:00:a4:6f:91,bus=pci.0,addr=0x3 \ +-chardev pty,id=charserial0 \ +-device isa-serial,chardev=charserial0,id=serial0 \ +-chardev socket,id=charchannel0,fd=35,server,nowait \ +-device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.qemu.guest_agent.0 \ +-spice port=5900,addr=0.0.0.0,disable-ticketing,seamless-migration=on \ +-device virtio-vga,id=video0,virgl=on,max_outputs=1,bus=pci.0,addr=0x2 \ +-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 \ +-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \ +-msg timestamp=on + +And these are the errors I see: + +2020-02-14T09:06:18.183167Z qemu-system-x86_64: VFIO_MAP_DMA failed: Invalid argument +2020-02-14T09:10:49.753767Z qemu-system-x86_64: VFIO_MAP_DMA failed: Cannot allocate memory +2020-02-14T09:11:04.530344Z qemu-system-x86_64: VFIO_MAP_DMA failed: No space left on device +2020-02-14T09:11:04.531087Z qemu-system-x86_64: VFIO_MAP_DMA failed: No space left on device +2020-02-14T09:11:04.531230Z qemu-system-x86_64: VFIO_MAP_DMA failed: No space left on device + + +I'm doing nothing with the disk inside the guest, but: + + # dd if=/dev/vda of=/dev/null status=progress + +(the disk appears as /dev/vda in the guest). Surprisingly, I do not see these errors when I use the traditional PCI assignment (-device vfio-pci). My versions of kernel and qemu: + +moe ~ # uname -r +5.4.15-gentoo +moe ~ # /home/zippy/work/qemu/qemu.git/x86_64-softmmu/qemu-system-x86_64 --version +QEMU emulator version 4.2.50 (v4.2.0-1439-g5d6542bea7-dirty) +Copyright (c) 2003-2019 Fabrice Bellard and the QEMU Project developers \ No newline at end of file |