This is an automated cleanup. This bug report has been moved to QEMU's new bug tracker on gitlab.com and thus gets marked as 'expired' now. Please continue with the discussion here:
https://gitlab.com/qemu-project/qemu/-/issues/65 ** Changed in: qemu Status: New => Expired ** Changed in: qemu Assignee: Philippe Mathieu-Daudé (philmd) => (unassigned) ** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #65 https://gitlab.com/qemu-project/qemu/-/issues/65 -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1863333 Title: Assigning NVMe disk to a domain causes VFIO_MAP_DMA errors Status in QEMU: Expired Bug description: 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 To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1863333/+subscriptions
