linux-kernel - Re: [PATCH] cpufreq: powernv: Return the actual CPU frequency in /proc/cpuinfo

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Date:   Fri, 06 Oct 2017 21:30:36 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Shriya <shriyak@...ux.vnet.ibm.com>, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, paulus@...ba.org
Cc:     mikey@...ling.org, aneesh.kumar@...ux.vnet.ibm.com,
        ego@...ux.vnet.ibm.com, Shriya <shriyak@...ux.vnet.ibm.com>
Subject: Re: [PATCH] cpufreq: powernv: Return the actual CPU frequency in /proc/cpuinfo

Shriya <shriyak@...ux.vnet.ibm.com> writes:

> Make /proc/cpuinfo read the frequency of the CPU it is running at
> instead of reading the cached value of the last requested frequency.
> In conditions like WOF/throttle CPU can be running at a different
> frequency than the requested frequency.

Sounds like a bug fix to me ?

cheers

> diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c
> index 897aa14..55ea4bf 100644
> --- a/arch/powerpc/platforms/powernv/setup.c
> +++ b/arch/powerpc/platforms/powernv/setup.c
> @@ -311,7 +311,7 @@ static unsigned long pnv_get_proc_freq(unsigned int cpu)
>  {
>  	unsigned long ret_freq;
>  
> -	ret_freq = cpufreq_quick_get(cpu) * 1000ul;
> +	ret_freq = cpufreq_get(cpu) * 1000ul;
>  
>  	/*
>  	 * If the backend cpufreq driver does not exist,
> -- 
> 1.9.1