Question: handling early hotplug interrupts

Michael Ellerman mpe at ellerman.id.au
Thu Aug 31 19:53:18 AEST 2017


Nathan Fontenot <nfont at linux.vnet.ibm.com> writes:
> On 08/30/2017 01:09 AM, Michael Ellerman wrote:
...
>> 
>> So this is simply a case of the init calls being out of order.
>> 
>> We either need to create the pseries_hp_wq earlier, or register the
>> event sources IRQs later. I'm not sure which is better.
>
> Perhaps I'm erring on the side of caution, but I think registering
> the IRQs later would be better. I think this would give the kernel
> more time to come and better handle a hotplug request.

Yeah I agree, unless there's some other reason why we must register
those IRQs early, but I don't know of one.

cheers


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