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Re: Question about scsi device hotplug (e.g scsi-hd)
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From: |
Paolo Bonzini |
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Subject: |
Re: Question about scsi device hotplug (e.g scsi-hd) |
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Date: |
Fri, 3 Apr 2020 15:51:30 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 |
On 03/04/20 15:45, Markus Armbruster wrote:
> Stefan Hajnoczi <address@hidden> writes:
>
> [...]
>> It would be nice to have a general solution in qdev core that makes
>> thread-safe hotplug easy for all devices.
> Excuse my ignorance / confusion...
>
> The "realize" concept exists to enable
>
> create device
> configure / wire up step by step without impact on the guest
> realize, device becomes "real" atomically
>
> How and why does this break down with threads?
After more discussions with Maxim, it's a bug in the SCSI layer. It
looks for devices without checking that they have been realized.
Paolo