Re: How to hot plugin a new vhost-user-blk-pci device to running VM?

在 2021年5月14日，21:15，Michal Prívozník <mprivozn(a)redhat.com&gt; 写道： On 5/14/21 8:33 AM, Liang Chaojun wrote: > > > Thanks，I have tried qemu monitor as below. I used chardev_add to add a chardev and used device_add it to running vm. But i often hit a issue and cause the vm crash. qemu-system-x86_64: ../hw/virtio/vhost.c:1566: vhost_dev_get_config: Assertion `hdev->vhost_ops' failed. > > virsh qemu-monitor-command spdk1 --hmp --cmd "chardev-add socket,id=spdk_vhost_blk0,path=/var/tmp/vhost.0,reconnect=1" virsh qemu-monitor-command spdk1 --hmp --cmd "device_add vhost-user-blk-pci,chardev=spdk_vhost_blk0,num-queues=4" Smells like problem described here: https://gitlab.com/qemu-project/qemu/-/commit/bc79c87bcde6587a37347f81332... But that's pretty fresh commit (part of qemu 6.0.0 release). And also the commit it references is not that old (qemu 5.1.0 release). What version of qemu are