Re: [Query]: tick-sched: why don't we stop tick when we are running idle task?

From: Viresh Kumar
Date: Mon Apr 14 2014 - 05:53:40 EST


On 14 April 2014 15:18, Preeti Murthy <preeti.lkml@xxxxxxxxx> wrote:
> I am not too sure about the complexity or the worthiness of this patch but
> just wanted to add that care must be taken to migrate the tick_sched_timer
> of all the remote CPUs off a hotplugged out CPU if the latter was keeping
> their time thus far. In the normal scenario I am guessing the tick_sched_timer
> dies along with the hotplugged out CPU since there is no need for it any more.

Agreed. Lets see if there is anybody in favor of this work as it is
very important
for some real time use cases we have. Like running data plane threads on
isolated CPUs.
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