linux-kernel - Re: [PATCH] base: arch_topology: Use policy->max to calculate freq

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 17 Nov 2021 10:12:34 +0000
From:   Lukasz Luba <lukasz.luba@....com>
To:     Thara Gopinath <thara.gopinath@...aro.org>
Cc:     sudeep.holla@....com, gregkh@...uxfoundation.org,
        rafael@...nel.org, bjorn.andersson@...aro.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH] base: arch_topology: Use policy->max to calculate
 freq_factor



On 11/15/21 8:10 PM, Thara Gopinath wrote:
> cpuinfo.max_freq can reflect boost frequency if enabled during boot.  Since
> we don't consider boost frequencies while calculating cpu capacities, use
> policy->max to populate the freq_factor during boot up.
> 
> Signed-off-by: Thara Gopinath <thara.gopinath@...aro.org>
> ---
>   drivers/base/arch_topology.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
> index 43407665918f..df818b439bc3 100644
> --- a/drivers/base/arch_topology.c
> +++ b/drivers/base/arch_topology.c
> @@ -334,7 +334,7 @@ init_cpu_capacity_callback(struct notifier_block *nb,
>   	cpumask_andnot(cpus_to_visit, cpus_to_visit, policy->related_cpus);
>   
>   	for_each_cpu(cpu, policy->related_cpus)
> -		per_cpu(freq_factor, cpu) = policy->cpuinfo.max_freq / 1000;
> +		per_cpu(freq_factor, cpu) = policy->max / 1000;
>   
>   	if (cpumask_empty(cpus_to_visit)) {
>   		topology_normalize_cpu_scale();
> 

LGTM

Reviewed-by: Lukasz Luba <lukasz.luba@...c.com>