Re: [RFC PATCH v2 00/17] Core scheduling v2

[Vineeth Remanan Pillai]

> Is this one missed? Or fixed with a better impl?
>
> The boot up CPUs don't match the possible cpu map, so the not onlined
> CPU rq->core are not initialized, which causes NULL pointer dereference
> panic in online_fair_sched_group():
>
Thanks for pointing this out. I think the ideal fix would be to
correctly initialize/cleanup the coresched attributes in the cpu
hotplug code path so that lock could be taken successfully if the
sibling is offlined/onlined after coresched was enabled. We are
working on another bug related to hotplugpath and shall introduce
the fix in v3.

Thanks