Re: what does nr_iowait_cpu() do?

On Mon, Jul 14, 2014 at 10:10 AM, Mohammad Merajul Islam Molla <meraj.enigma@gmail.com> wrote:

Hello,

I was looking into the code of cpuidle menu governor and it uses a function nr_iowait_cpu(int cpu). I could not find out what this function does.

Can someone please explain what nr_iowait_cpu(int cpu) and variant nr_iowait() do?

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In all its glory: unsigned long nr_iowait_cpu(int cpu) { struct rq *this = cpu_rq(cpu); return atomic_read(&this->nr_iowait); }

Thanks, -Meraj

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