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Re: [Qemu-block] [Question] How can we confirm hot-plug disk succesfully
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From: |
Kevin Wolf |
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Subject: |
Re: [Qemu-block] [Question] How can we confirm hot-plug disk succesfully? |
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Date: |
Mon, 19 Jun 2017 09:27:27 +0200 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
Am 18.06.2017 um 09:21 hat Xie Changlong geschrieben:
> In device hot-remove scenario, if we don't probe acpiphp module on
> the guest, 'device_del' will never emit DEVICE_DELETED event(because
> guest will not write to __EJ0) . So we can confirm that hot-remove
> failed. But IIUC, there is no event such as DEVICE_ADDED, so
> 1) How can we confirm hotplug('device_add') successfully?
> 2) It seems when hot-plug disk, we don't care acpiphp module status
> on the guest, am I right?
> 3) Why there is no DEVICE_ADDED like event?
device_add doesn't need guest cooperation, so it is immediately
completed when the QMP command returns success.
Kevin