On Sat, Apr 2, 2016 at 6:10 AM, Daniel Lezcano <daniel.lezc...@linaro.org> wrote: > On 04/02/2016 08:15 AM, Lianwei Wang wrote: >>> >>> >>> * Lianwei Wang <lianwei.w...@gmail.com> wrote: >>> >>>> The wake_up_all_idle_cpus API always wake up all the online >>>> cpus, but sometimes we only want to wake up a set of cpus. >>>> Use a generic function to wake up a group of cpus that is >>>> specified by the cpumask parameter. This generic API can >>>> benefit to the cases that only need to wake up a set of >>>> cpus. >>> >>> >>> What is the new user of this new argument to the wake-up call? >>> >>> Thanks, >>> >>> Ingo >> >> >> The ARM big.LITTLE arch is one of the users to use the new wake up >> call. Two clusters in these SoCs and each cluster has 2 or more CPUs. >> For some cases, we only need to wake up the cpus on one cluster, not >> all the cpus. The other cluster can keep in idle state to save power. >> Another use case is that for the threads/irqs that bind to some cpus, >> we also want to wake up the cpus that the threads/irqs bind to, and >> the other cpus can stay in idle state. I'm updating the pm_qos code to >> support binding the request to a set of cpus, and the >> cpuidle_latency_notify call can pass the cpumask parameter to the new >> wake-up call. > > > Hi Lianwei, > > a quick suggestion : cpuidle_driver->cpumask > > -- Daniel > > > -- > <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs > > Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook | > <http://twitter.com/#!/linaroorg> Twitter | > <http://www.linaro.org/linaro-blog/> Blog >
Yes, Daniel. Send a cpumask to cpuidle_driver from pm_qos. Did you do it already? Or are you planing to do it?
