Re: [PATCH v10 0/4] Add support for AArch64 AMUv1-based average freq

[Catalin Marinas <catalin.marinas@arm.com>]

On Tue, Feb 18, 2025 at 01:00:20AM +0100, Beata Michalska wrote:
> On Mon, Feb 17, 2025 at 09:32:06PM +0000, Catalin Marinas wrote:
> > On Fri, 31 Jan 2025 16:24:35 +0000, Beata Michalska wrote:
> > > This series adds support for obtaining an average CPU frequency based on
> > > a hardware provided feedback. The average frequency is being exposed via
> > > dedicated yet optional cpufreq sysfs attribute - cpuinfo_avg_freq.
> > > The architecture specific bits are being provided for AArch64, caching on
> > > existing implementation for FIE and AMUv1 support: the frequency scale
> > > factor, updated on each sched tick, serving as a base for retrieving
> > > the frequency for a given CPU, representing an average frequency
> > > reported between the ticks.
> > > 
> > > [...]
> >
> Thank you for that.
> 
> There is still a (not so) small issue with patch
> [3/4] arm64: Provide an AMU-based version of arch_freq_get_on_cpu.
> It did not come up while testing, sadly.
> No idea how I could have missed that, nor why I made the mistake
> in the first place.
> 
> The fix is pretty straightforward:
> 
> diff --git a/arch/arm64/kernel/topology.c b/arch/arm64/kernel/topology.c
> index 6f0cab8e746b..4bac26d8e29c 100644
> --- a/arch/arm64/kernel/topology.c
> +++ b/arch/arm64/kernel/topology.c
> @@ -268,7 +268,7 @@ int arch_freq_get_on_cpu(int cpu)
>  
>                         do {
>                                 ref_cpu = cpumask_next_wrap(ref_cpu, policy->cpus,
> -                                                           start_cpu, false);
> +                                                           start_cpu, true);
> 
> Please let me know if you want me to send new version with the fix applied.

Usually we apply another patch on top with a Fixes tag or just fold it
in if no-one relies on this branch being stable. I'll do the latter, no
need to resend.

Thanks.

-- 
Catalin