| Summary: | hot delete virtio nic then migrate, dest guest become irresponsive | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | Chao Yang <chayang> |
| Component: | kvm | Assignee: | Virtualization Maintenance <virt-maint> |
| Status: | CLOSED NOTABUG | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 5.7 | CC: | juzhang, michen, mkenneth, virt-maint |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-05-12 02:48:45 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
Tried following scenario, hit same issue: 1. boot a guest without networking /usr/libexec/qemu-kvm -M rhel5.6.0 -no-hpet -rtc-td-hack -startdate now -name rhel5.7 -smp 2 -m 2048 -cpu qemu64,+sse2 -uuid `uuidgen` -boot c -net none -drive file=/opt/rhel5.7.qcow2,media=disk,if=virtio,cache=none,boot=on,format=qcow2 -vnc :1 -notify all -balloon none -monitor stdio 2. hot add a virtio nic (qemu) pci_add pci_addr=auto nic vlan=1,macaddr=F0:4D:A2:94:65:32,model=virtio OK domain 0, bus 0, slot 4, function 0 (qemu) host_net_add tap vlan=1,script=/etc/qemu-ifup (qemu) info network VLAN 0 devices: VLAN 1 devices: virtio.0: model=virtio,macaddr=f0:4d:a2:94:65:32 tap.0: ifname=tap0,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown 3. migrate (qemu) migrate -d tcp:10.66.x.x:8000 (qemu) migration_notify_done info migrate Migration status: active transferred ram: 83394 kbytes remaining ram: 509352 kbytes total ram: 2117644 kbytes (qemu) migration_notify_done info migrate Migration status: completed 4. check in dest guest Actual Result: hit same issue describes in Comment #0 Closing cause not support hot add/delete nic then migrate. |
Description of problem: Please see following steps. Version-Release number of selected component (if applicable): kvm-83-232.el5.x86_64 How reproducible: 100% Steps to Reproduce: 1. boot a guest with virtio nic by: /usr/libexec/qemu-kvm -M rhel5.6.0 -no-hpet -rtc-td-hack -startdate now -name rhel5.7 -smp 2 -m 2048 -cpu qemu64,+sse2 -uuid `uuidgen` -boot c -net nic,vlan=1,macaddr=F0:4D:A2:94:65:32,model=virtio -net tap,vlan=1,script=/etc/qemu-ifup -drive file=/opt/rhel5.7.qcow2,media=disk,if=virtio,cache=none,boot=on,format=qcow2 -vnc :1 -notify all -balloon none -monitor stdio 2. modprobe acpiphp in guest then hot unplug the virtio nic by: (qemu) info network VLAN 1 devices: tap.0: ifname=tap0,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown virtio.0: model=virtio,macaddr=f0:4d:a2:94:65:32 (qemu) host_net_remove 1 tap.0 /etc/qemu-ifdown: could not launch network script (qemu) info pci Bus 0, device 0, function 0: Host bridge: PCI device 8086:1237 Bus 0, device 1, function 0: ISA bridge: PCI device 8086:7000 Bus 0, device 1, function 1: IDE controller: PCI device 8086:7010 BAR4: I/O at 0xc000 [0xc00f]. Bus 0, device 1, function 3: Bridge: PCI device 8086:7113 IRQ 9. Bus 0, device 2, function 0: VGA controller: PCI device 1013:00b8 BAR0: 32 bit memory at 0xc2000000 [0xc3ffffff]. BAR1: 32 bit memory at 0xc4000000 [0xc4000fff]. Bus 0, device 3, function 0: Ethernet controller: PCI device 1af4:1000 IRQ 11. BAR0: I/O at 0xc020 [0xc03f]. Bus 0, device 4, function 0: SCSI controller: PCI device 1af4:1001 IRQ 11. BAR0: I/O at 0xc040 [0xc07f]. (qemu) pci_del pci_addr=0:3 (qemu) info network VLAN 1 devices: (qemu) info pci Bus 0, device 0, function 0: Host bridge: PCI device 8086:1237 Bus 0, device 1, function 0: ISA bridge: PCI device 8086:7000 Bus 0, device 1, function 1: IDE controller: PCI device 8086:7010 BAR4: I/O at 0xc000 [0xc00f]. Bus 0, device 1, function 3: Bridge: PCI device 8086:7113 IRQ 9. Bus 0, device 2, function 0: VGA controller: PCI device 1013:00b8 BAR0: 32 bit memory at 0xc2000000 [0xc3ffffff]. BAR1: 32 bit memory at 0xc4000000 [0xc4000fff]. Bus 0, device 4, function 0: SCSI controller: PCI device 1af4:1001 IRQ 11. BAR0: I/O at 0xc040 [0xc07f]. check in guest, virtio nic indeed is hot deleted. 3. start a guest in listening mode by: /usr/libexec/qemu-kvm -M rhel5.6.0 -no-hpet -rtc-td-hack -startdate now -name rhel5.7 -smp 2 -m 2048 -cpu qemu64,+sse2 -uuid `uuidgen` -boot c -net none -drive file=/opt/rhel5.7.qcow2,media=disk,if=virtio,cache=none,boot=on,format=qcow2 -vnc :1 -notify all -balloon none -monitor stdio -incoming tcp:0:8000 4. migrate the src guest: (qemu) migrate -d tcp:10.66.x.x:8000 (qemu) migration_notify_done info migrate Migration status: active transferred ram: 53698 kbytes remaining ram: 523500 kbytes total ram: 2117644 kbytes (qemu) migration_notify_done info migrate Migration status: completed 5. issue "lspci|grep Eth" in guest Actual results: After step 5, guest gives no response to "lspci|grep Eth" as well as other commands, I mean you can type in guest but hit "Enter" will output nothing, but monitor is alive and responsive. Expected results: Additional info: