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

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]

Message-ID: <849b34d099f34f8e9422cab1e054e44f8055f29f.camel@linux.intel.com>
Date:   Mon, 04 Jan 2021 04:00:40 -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

On Mon, 2021-01-04 at 12:56 +0100, 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.
I thought of applying these to the next 5.11-rc release.
If you want to queue for the next merge window (5.12) then I have other
enhancements, which I will send a PULL request.

Thanks,
Srinivas

> 
> Regards,
> 
> Hans
>