[Bug 667689] [NEW] qemu monitor pci_add results in dropped network connection / device

Thu Oct 28 11:12:04 BST 2010

Public bug reported:

Binary package hint: qemu-kvm

Ubuntu 10.04 x86_64
KVM Host: 2.6.32-25-generic-tp #45~tp13-Ubuntu SMP Fri Oct 22 06:33:15 UTC 2010 x86_64 GNU/Linux
KVM Guest: 2.6.32-24-server #39-Ubuntu SMP Wed Jul 28 06:21:40 UTC 2010 x86_64 GNU/Linux

qemu-kvm:
  Installiert: 0.12.3+noroms-0ubuntu9.3

when hotpluging a disk into a running vm, network connection in the guest dies. this should not happen?! ;)

Can be reproduced like this:

guest:
modprobe acpiphp

host:
dd if=/dev/zero of=/root/foo bs=1M count=100

connect into qemu monitor, then:
pci_add auto storage file=/root/test.img,if=virtio

after a reboot, i got this from the logs:
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.195337] pci 0000:00:05.0: reg 10 io port: [0x00-0x3f]
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.195393] pci 0000:00:05.0: reg 14 32bit mmio: [0x000000-0x000fff]
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.196803] pci 0000:00:00.0: no hotplug settings from platform
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.196813] pci 0000:00:00.0: using default PCI settings
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.196870] pci 0000:00:01.0: no hotplug settings from platform
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.196873] pci 0000:00:01.0: using default PCI settings
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.196931] ata_piix 0000:00:01.1: no hotplug settings from platform
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.196935] ata_piix 0000:00:01.1: using default PCI settings
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.197004] uhci_hcd 0000:00:01.2: no hotplug settings from platform
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.197007] uhci_hcd 0000:00:01.2: using default PCI settings
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.197071] piix4_smbus 0000:00:01.3: no hotplug settings from platform
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.197074] piix4_smbus 0000:00:01.3: using default PCI settings
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.197130] pci 0000:00:02.0: no hotplug settings from platform
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.197134] pci 0000:00:02.0: using default PCI settings
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.199710] virtio-pci 0000:00:03.0: no hotplug settings from platform
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.199730] virtio-pci 0000:00:03.0: using default PCI settings
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.199802] virtio-pci 0000:00:04.0: no hotplug settings from platform
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.199806] virtio-pci 0000:00:04.0: using default PCI settings
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.199873] pci 0000:00:05.0: no hotplug settings from platform
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.199877] pci 0000:00:05.0: using default PCI settings
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.205968] virtio-pci 0000:00:05.0: enabling device (0000 -> 0003)
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.207366] ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 10
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.207399] virtio-pci 0000:00:05.0: PCI INT A -> Link[LNKA] -> GSI 10 (level, high) -> IRQ 10
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.207934]   alloc irq_desc for 29 on node -1
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.207938]   alloc kstat_irqs on node -1
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.207999] virtio-pci 0000:00:05.0: irq 29 for MSI/MSI-X
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.208002]   alloc irq_desc for 30 on node -1
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.208005]   alloc kstat_irqs on node -1
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.208038] virtio-pci 0000:00:05.0: irq 30 for MSI/MSI-X
Oct 28 11:32:31 mkrinke-test kernel: [ 1163.209750]  vdb: unknown partition table

Tried this on my notebook (core i5) as well as on an intel xeon (six-core) server with same results.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: qemu-kvm 0.12.3+noroms-0ubuntu9.3
ProcVersionSignature: Ubuntu 2.6.32-25.45~tp13-generic-tp 2.6.32.21+drm33.7
Uname: Linux 2.6.32-25-generic-tp x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Thu Oct 28 11:50:47 2010
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
KvmCmdLine:
 UID        PID  PPID  C    SZ   RSS PSR STIME TTY          TIME CMD
 root      7881     1  2 314992 520608 3 11:34 ?        00:00:29 /usr/bin/kvm -S -M pc-0.12 -enable-kvm -m 1024 -smp 2 -name ubuntu-server -uuid 87a41685-6c5d-b7a5-e4f8-076424527d7e -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/ubuntu-server.monitor,server,nowait -monitor chardev:monitor -boot c -drive file=/var/lib/libvirt/images/ubuntu-server.img,if=virtio,index=0,boot=on,format=raw -drive if=ide,media=cdrom,index=2,format=raw -net nic,macaddr=52:54:00:65:8c:74,vlan=0,model=virtio,name=virtio.0 -net tap,fd=42,vlan=0,name=tap.0 -chardev pty,id=serial0 -serial chardev:serial0 -parallel none -usb -vnc 127.0.0.1:0 -vga cirrus
MachineType: LENOVO 2904FYG
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.32-25-generic-tp root=UUID=60f0b034-8610-44bd-98db-76583c4ae608 ro crashkernel=384M-2G:64M,2G-:128M quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: qemu-kvm
dmi.bios.date: 09/02/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 6UET53WW (1.33 )
dmi.board.name: 2904FYG
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr6UET53WW(1.33):bd09/02/2010:svnLENOVO:pn2904FYG:pvrThinkPadT410s:rvnLENOVO:rn2904FYG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2904FYG
dmi.product.version: ThinkPad T410s
dmi.sys.vendor: LENOVO

** Affects: qemu-kvm (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: amd64 apport-bug lucid

-- 
qemu monitor pci_add results in dropped network connection / device
https://bugs.launchpad.net/bugs/667689
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