Crash in kvmppc_xive_release()

[Michael Ellerman]

Cédric Le Goater <clg at kaod.org> writes:
> On 18/07/2019 14:49, Michael Ellerman wrote:
>> Anyone else seen this?
>> 
>> This is running ~176 VMs on a Power9 (1 per thread), host crashes:
>
> This is beyond the underlying limits of XIVE. 
>
> As we allocate 2K vCPUs per VM, that is 16K EQs for interrupt events. The overall
> EQ count is 1M. I let you calculate what is our max number of VMs ...

We need to fix it somehow, people will expect to be able to run a VM per
thread.

cheers