Messages in this thread | | | Date | Thu, 21 Nov 2013 08:21:03 -0800 | From | Arjan van de Ven <> | Subject | Re: [PATCH 3/7] idle, thermal, acpi: Remove home grown idle implementations |
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On 11/21/2013 8:07 AM, Paul E. McKenney wrote: > As long as RCU has some reliable way to identify an idle task, I am > good. But I have to ask -- why can't idle injection coordinate with > the existing idle tasks rather than temporarily making alternative > idle tasks?
it's not a real idle. that's the whole problem of the situation. to the rest of the OS, this is being BUSY (busy saving power using a CPU instruction, but it might as well have been an mdelay() operation) and it's also what end users expect; they want to be able to see where there performance (read: cpu time in "top") is going.
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