Re: libxl / xen-pciback interaction [and 1 more messages]

[Jan Beulich <jbeulich@xxxxxxxx>]

On 17.03.2021 16:55, Ian Jackson wrote:
> Jan Beulich writes ("Re: libxl / xen-pciback interaction [and 1 more 
> messages]"):
>> On 17.03.2021 16:12, Ian Jackson wrote:
>>> How does what libxl is doing differ from a setup, immediately followed
>>> by a hot-add ?
>>
>> In the hot-add case libxl drives things through Reconfiguring state.
>> I'm not sure this would be an appropriate (and backwards compatible)
>> thing to do when initially populating xenstore.
> 
> Ah.  Tbanks, that is precisely the answer to my question.
> 
> I think that means, therefore, populating the whole lot in one
> transaction.
> 
> (From what you say it doesn't sound like it's possible to write only a
> subset, perhaps with state "not ready yet" and then set them all go
> "go" at the end.)

Indeed, that's my understanding and a consequence of pciback's watch
covering the entire backend subtree, rather than e.g. just the
num_devs node.

Jan