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Hi again, Eddie :) Answer inline...

On 07/06/2017 08:14 PM, Eddie Yen wrote:
> Hi everyone,
> 
> I'm using OpenStack Mitaka version (deployed from Fuel 9.2)
> 
> In present, I installed two different model of GPU card.
> 
> And wrote these information into pci_alias and pci_passthrough_whitelist 
> in nova.conf on Controller and Compute (the node which installed GPU).
> Then restart nova-api, nova-scheduler,and nova-compute.
> 
> When I check database, both of GPU info registered in pci_devices table.
> 
> Now I removed one of the GPU from compute node, and remove the 
> information from nova.conf, then restart services.
> 
> But I check database again, the information of the removed card still 
> exist in pci_devices table.
> 
> How can I do to fix this problem?

So, when you removed the GPU from the compute node and restarted the 
nova-compute service, it *should* have noticed you had removed the GPU 
and marked that PCI device as deleted. At least, according to this code 
in the PCI manager:

https://github.com/openstack/nova/blob/master/nova/pci/manager.py#L168-L183

Question for you: what is the value of the status field in the 
pci_devices table for the GPU that you removed?

Best,
-jay

p.s. If you really want to get rid of that device, simply remove that 
record from the pci_devices table. But, again, it *should* be removed 
automatically...