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:
<controller type='scsi' index='0' model='virtio-scsi'> <driver iothread='26'/> <alias name='scsi0'/><address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
</controller> <controller type='scsi' index='1' model='virtio-scsi'> <driver iothread='27'/> <alias name='scsi1'/><address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>
</controller> <controller type='scsi' index='2' model='virtio-scsi'> <driver iothread='28'/> <alias name='scsi2'/><address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/>
</controller> <controller type='scsi' index='3' model='virtio-scsi'> <driver iothread='29'/> <alias name='scsi3'/><address type='pci' domain='0x0000' bus='0x00' slot='0x0c' function='0x0'/>
</controller>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!
<<attachment: lizhengui.vcf>>
