On Fri, Aug 07, 2020 at 01:07:20PM -0400, Joel Fernandes (Google) wrote:
> The FQS loop detecting that an offline CPU has not yet reported a
> quiescent state, is a serious problem. The current interaction between
> RCU quiescent-state reporting and CPU-hotplug operations means that the
> FQS loop
The FQS loop detecting that an offline CPU has not yet reported a
quiescent state, is a serious problem. The current interaction between
RCU quiescent-state reporting and CPU-hotplug operations means that the
FQS loop should never find that an offline CPU (by RCU's understanding
of what is offline
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