linux-kernel - Re: tools/power/x86/intel-speed-select: Fixes for regression

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Date:   Mon, 04 Jan 2021 04:01:41 -0800
From:   Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     Hans de Goede <hdegoede@...hat.com>, mgross@...ux.intel.com
Cc:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: tools/power/x86/intel-speed-select: Fixes for regression

Hi Hans,

On Mon, 2021-01-04 at 12:57 +0100, Hans de Goede wrote:
> Hi,
> 
> On 1/4/21 12:56 PM, Hans de Goede wrote:
> > Hi,
> > 
> > On 12/21/20 8:18 AM, Srinivas Pandruvada wrote:
> > > One side-effect of fixing the scaling frequency limits using the
> > > commit eacc9c5a927e ("cpufreq: intel_pstate: Fix
> > > intel_pstate_get_hwp_max()
> > > for turbo disabled") causes stale HWP_CAP.GUARANTEED to be used
> > > as max.
> > > Without processing HWP interrupts, user space needs to be able to
> > > update
> > > a new max while Intel SST is in use. This is not a problem as the
> > > change of guaranteed is caused by user space action, so user
> > > space knows
> > > that guarantee will change.
> > > 
> > > This series causes user space to trigger scaling_max_freq update
> > > with
> > > the new base_frequency.
> > > 
> > > 
> > > Srinivas Pandruvada (2):
> > >   tools/power/x86/intel-speed-select: Set scaling_max_freq to
> > >     base_frequency
> > >   tools/power/x86/intel-speed-select: Set higher of
> > > cpuinfo_max_freq or
> > >     base_frequency
> > 
> > Thank you for your patch-series, I've applied the series to my
> > review-hans branch:
> > https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans
> > 
> > Note it will show up in my review-hans branch once I've pushed my
> > local branch there, which might take a while.
> > 
> > Once I've run some tests on this branch the patches there will be
> > added to the platform-drivers-x86/for-next branch and eventually
> > will be included in the pdx86 pull-request to Linus for the next
> > merge-window.
> 
> Note this is a templated reply, I will also cherry-pick these into
> the
> fixes branch in this case.
> 
Then you can ignore my previous email.

Thanks,
Srinivas

> Regards,
> 
> Hans
>