Re: [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
> >
>
>