[Bug 1779120] Re: disk missing in the guest contingently when hotplug several virtio scsi disks consecutively
[Expired for QEMU because there has been no activity for 60 days.] ** Changed in: qemu Status: Incomplete => Expired -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1779120 Title: disk missing in the guest contingently when hotplug several virtio scsi disks consecutively Status in QEMU: Expired Bug description: Hi, I found a bug that disk missing (not all disks missing ) in the guest contingently when hotplug several virtio scsi disks consecutively. After rebooting the guest,the missing disks appear again. The guest is centos7.3 running on a centos7.3 host and the scsi controllers are configed with iothread. The scsi controller xml is below: If the scsi controllers are configed without iothread, disks are all can be seen in the guest when hotplug several virtio scsi disks consecutively. I think the biggest difference between them is that scsi controllers with iothread call virtio_notify_irqfd to notify guest and scsi controllers without iothread call virtio_notify instead. What make it difference? Will interrupts are lost when call virtio_notify_irqfd due to race condition for some unknow reasons? Maybe guys more familiar with scsi dataplane can help. Thanks for your reply! To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1779120/+subscriptions
[Bug 1779120] Re: disk missing in the guest contingently when hotplug several virtio scsi disks consecutively
The QEMU project is currently considering to move its bug tracking to another system. For this we need to know which bugs are still valid and which could be closed already. Thus we are setting older bugs to "Incomplete" now. If you still think this bug report here is valid, then please switch the state back to "New" within the next 60 days, otherwise this report will be marked as "Expired". Or mark it as "Fix Released" if the problem has been solved with a newer version of QEMU already. Thank you and sorry for the inconvenience. ** Changed in: qemu Status: New => Incomplete -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1779120 Title: disk missing in the guest contingently when hotplug several virtio scsi disks consecutively Status in QEMU: Incomplete Bug description: Hi, I found a bug that disk missing (not all disks missing ) in the guest contingently when hotplug several virtio scsi disks consecutively. After rebooting the guest,the missing disks appear again. The guest is centos7.3 running on a centos7.3 host and the scsi controllers are configed with iothread. The scsi controller xml is below: If the scsi controllers are configed without iothread, disks are all can be seen in the guest when hotplug several virtio scsi disks consecutively. I think the biggest difference between them is that scsi controllers with iothread call virtio_notify_irqfd to notify guest and scsi controllers without iothread call virtio_notify instead. What make it difference? Will interrupts are lost when call virtio_notify_irqfd due to race condition for some unknow reasons? Maybe guys more familiar with scsi dataplane can help. Thanks for your reply! To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1779120/+subscriptions
Re: [Qemu-devel] [Bug 1779120] Re: disk missing in the guest contingently when hotplug several virtio scsi disks consecutively
Hi, Stefan. (host)# rpm -qa | grep qemu-kvm qemu-kvm-2.8.1-25.142.x86_64 (guest)# uname -r 3.10.0-514.el7.x86_64 I also tried the newest version of qemu-kvm, but it also met this issue. The steps to reproduce this issue are below: 1)attach four virtio-scsi controller with dataplane to vm. 2)attach 35 virtio-scsi disks(sda - sdai) to vm consecutively. One controller has 15 scsi disks. A example of disk xml is below: You can write a shell script like this: for((i=1;i++;i<=35)) do virsh attach-device centos7.3_64_server scsi_disk_$i.xml --config --live done This issue is a probabilistic event. If it does not appear, repeat the above steps several more times. Thank you! On 2018/6/28 21:01, Stefan Hajnoczi wrote: > Please post the following information: > (host)# rpm -qa | grep qemu-kvm > (guest)# uname -r > > What are the exact steps to reproduce this issue (virsh command-lines > and XML)? > -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1779120 Title: disk missing in the guest contingently when hotplug several virtio scsi disks consecutively Status in QEMU: New Bug description: Hi, I found a bug that disk missing (not all disks missing ) in the guest contingently when hotplug several virtio scsi disks consecutively. After rebooting the guest,the missing disks appear again. The guest is centos7.3 running on a centos7.3 host and the scsi controllers are configed with iothread. The scsi controller xml is below: If the scsi controllers are configed without iothread, disks are all can be seen in the guest when hotplug several virtio scsi disks consecutively. I think the biggest difference between them is that scsi controllers with iothread call virtio_notify_irqfd to notify guest and scsi controllers without iothread call virtio_notify instead. What make it difference? Will interrupts are lost when call virtio_notify_irqfd due to race condition for some unknow reasons? Maybe guys more familiar with scsi dataplane can help. Thanks for your reply! To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1779120/+subscriptions
[Qemu-devel] [Bug 1779120] Re: disk missing in the guest contingently when hotplug several virtio scsi disks consecutively
I also met this bug -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1779120 Title: disk missing in the guest contingently when hotplug several virtio scsi disks consecutively Status in QEMU: New Bug description: Hi, I found a bug that disk missing (not all disks missing ) in the guest contingently when hotplug several virtio scsi disks consecutively. After rebooting the guest,the missing disks appear again. The guest is centos7.3 running on a centos7.3 host and the scsi controllers are configed with iothread. The scsi controller xml is below: If the scsi controllers are configed without iothread, disks are all can be seen in the guest when hotplug several virtio scsi disks consecutively. I think the biggest difference between them is that scsi controllers with iothread call virtio_notify_irqfd to notify guest and scsi controllers without iothread call virtio_notify instead. What make it difference? Will interrupts are lost when call virtio_notify_irqfd due to race condition for some unknow reasons? Maybe guys more familiar with scsi dataplane can help. Thanks for your reply! To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1779120/+subscriptions
[Qemu-devel] [Bug 1779120] Re: disk missing in the guest contingently when hotplug several virtio scsi disks consecutively
Please post the following information: (host)# rpm -qa | grep qemu-kvm (guest)# uname -r What are the exact steps to reproduce this issue (virsh command-lines and XML)? -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1779120 Title: disk missing in the guest contingently when hotplug several virtio scsi disks consecutively Status in QEMU: New Bug description: Hi, I found a bug that disk missing (not all disks missing ) in the guest contingently when hotplug several virtio scsi disks consecutively. After rebooting the guest,the missing disks appear again. The guest is centos7.3 running on a centos7.3 host and the scsi controllers are configed with iothread. The scsi controller xml is below: If the scsi controllers are configed without iothread, disks are all can be seen in the guest when hotplug several virtio scsi disks consecutively. I think the biggest difference between them is that scsi controllers with iothread call virtio_notify_irqfd to notify guest and scsi controllers without iothread call virtio_notify instead. What make it difference? Will interrupts are lost when call virtio_notify_irqfd due to race condition for some unknow reasons? Maybe guys more familiar with scsi dataplane can help. Thanks for your reply! To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1779120/+subscriptions
