Messages in this thread | | | Subject | Re: [PATCH 0/2] sparc64: Use low latency path to resume idle cpu | From | Vijay Kumar <> | Date | Thu, 20 Jul 2017 23:11:45 -0500 |
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On 7/20/2017 10:45 PM, David Miller wrote: > 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. Yes, I see your point.
> 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.
Sure. Thanks.
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