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Re: [Qemu-devel] [SPDK] qemu process hung at boot-up, no explicit errors
From: |
John Snow |
Subject: |
Re: [Qemu-devel] [SPDK] qemu process hung at boot-up, no explicit errors or warnings |
Date: |
Thu, 19 Apr 2018 13:17:40 -0400 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 |
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
>