Re: [Qemu-block] [Qemu-devel] [SPDK] qemu process hung at boot-up, no explicit errors or warnings

[Bob Chen]

2.11.1 could work, qemu is no longer occupying 100% CPU. That's interesting...

Now I can see the starting screen via vnc, says that not a bootable disk.

Is that because the guest OS's virtio vhost driver is not up to date enough?
​

Thanks,

Bob

2018-04-20 1:17 GMT+08:00 John Snow <address@hidden>:

Forwarding to qemu-block.

On 04/19/2018 06:13 AM, Bob Chen wrote:
> Hi,
>
> I was trying to run qemu with spdk, referring to
> http://www.spdk.io/doc/vhost.html#vhost_qemu_config
>
> Everything went well since I had already set up hugepages, vfio, vhost
> targets, vhost-scsi device(vhost-block was also tested), etc, without
> errors or warnings reported.
>
> But at the last step to run qemu, the process would somehow hang. And its
> cpu busy remained 100%.
>
> I used `perf top -p` to monitor the process activity,
>   18.28%  [kernel]                      [k] vmx_vcpu_run
>    3.06%  [kernel]                      [k] vcpu_enter_guest
>    3.05%  [kernel]                      [k] system_call_after_swapgs
>
> Do you have any ideas about what happened here?
>
> Test environment: latest CentOS 7 kernel, nvme ssd, spdk v18.01.x,
> dpdk 17.11.1, qemu 2.12.0-rc2. Detail log is attached within this mail.
>

Have you tried any other versions? (2.11.1, or 2.12-rc4?)

>
>
> Thanks,
> Bob
>