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

[Bob Chen]

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.



Thanks,
Bob

qemu-spdk.log
Description: Binary data