------- Comment From [email protected] 2025-08-21 07:04 EDT------- Hi Team,
Tested the issue on ubuntu 25.10 on kernel 6.16.0-13-generic, The issue is Not Reproducible. ------- OS and kernel ------ root@ubuntu:/home# cat /etc/os-release PRETTY_NAME="Ubuntu Questing Quokka (development branch)" NAME="Ubuntu" VERSION_ID="25.10" VERSION="25.10 (Questing Quokka)" VERSION_CODENAME=questing ID=ubuntu ID_LIKE=debian HOME_URL="https://www.ubuntu.com/"; SUPPORT_URL="https://help.ubuntu.com/"; BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"; PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"; UBUNTU_CODENAME=questing LOGO=ubuntu-logo root@ubuntu:/home# uname -a Linux ubuntu 6.16.0-13-generic #13-Ubuntu SMP PREEMPT_DYNAMIC Thu Aug 7 16:06:52 UTC 2025 ppc64le ppc64le ppc64le GNU/Linux ------ steps to reproduce -------- 1) start a guest with mentioned OS and kernel 2) attach a pci device to the guest 3) Detach the device from the guest using virsh detach-device command 4) The device got detached successfully from the guest, and there were no warnings seen on host console. root@ubuntu:/home# lspci 0181:60:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller PM173X root@ubuntu:/home# cat nvme1.xml <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0181' bus='0x60' slot='0x00' function='0x0'/> </source> </hostdev> root@ubuntu:/home# virsh attach-device vm1 nvme1.xml Device attached successfully root@ubuntu:/home# virsh detach-device vm1 nvme1.xml Device detached successfully root@ubuntu:/home# dmesg | tail [10852.078154] vfio-pci 0181:60:00.0: reset done [10852.502391] nvme 0181:60:00.0: ibm,query-pe-dma-windows(53) 600000 8000000 20000181 returned 0, lb=1000000 ps=103 wn=1 [10852.502610] nvme 0181:60:00.0: ibm,create-pe-dma-window(54) 600000 8000000 20000181 15 24 returned 0 (liobn = 0x70000181 starting addr = 8000000 0) [10852.503772] nvme 0181:60:00.0: lsa_required: 0, lsa_enabled: 0, direct mapping: 1 [10852.503782] nvme 0181:60:00.0: lsa_required: 0, lsa_enabled: 0, direct mapping: 1 [10852.503889] nvme nvme0: pci function 0181:60:00.0 [10852.526940] nvme nvme0: D3 entry latency set to 10 seconds [10852.532411] hwmon hwmon0: temp1_input not attached to any thermal zone [10852.532424] hwmon hwmon0: temp2_input not attached to any thermal zone [10852.553814] nvme nvme0: 32/0/0 default/read/poll queues ----- on guest ------ root@guest:~# lspci 00:01.0 Ethernet controller: Red Hat, Inc. Virtio network device 00:02.0 USB controller: Red Hat, Inc. QEMU XHCI Host Controller (rev 01) 00:03.0 SCSI storage controller: Red Hat, Inc. Virtio SCSI 00:04.0 Communication controller: Red Hat, Inc. Virtio console 00:05.0 SCSI storage controller: Red Hat, Inc. Virtio block device 00:06.0 Unclassified device [00ff]: Red Hat, Inc. Virtio memory balloon Thank you, Tasmiya -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2104893 Title: WARNING: CPU: 18 PID: 3683 at arch/powerpc/kvm/../../../virt/kvm/vfio.c Call Traces seen when pci device is detached from the kvm guest To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/2104893/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
