Messages in this thread | | | Date | Fri, 21 Jul 2017 04:45:10 +0100 (WEST) | Subject | Re: [PATCH 0/2] sparc64: Use low latency path to resume idle cpu | From | David Miller <> |
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From: Vijay Kumar <vijay.ac.kumar@oracle.com> Date: Thu, 20 Jul 2017 22:36:42 -0500
> I can give a try :). But looks to me one thing that will go wrong is > irq accounting done in __irq_enter() and rcu_irq_enter().
Actually, the bigger problem is that scheduler_ipi() can raise a software interrupt, and nothing will invoke it.
It's turning quite ugly to avoid the IRQ overhead, I must admit. So ignore this for now.
In the longer term a probably cleaner way to do this is to have a special direct version of scheduler_ipi() that invokes all the necessary work, even the rebalance softirq, directly rather than indirectly.
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