linux-kernel - Re: [PATCH v3 0/6] powernv: cpufreq: Report frequency throttle by OCC

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Message-ID: <CAKohpokZcJeCEaKnfQC-78s2KKCJ9a7UqSA_R8VbjEX2HUGVNQ@mail.gmail.com>
Date:	Fri, 8 May 2015 10:42:34 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Shilpasri G Bhat <shilpa.bhat@...ux.vnet.ibm.com>
Cc:	"linuxppc-dev@...abs.org" <linuxppc-dev@...abs.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Preeti U Murthy <preeti@...ux.vnet.ibm.com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>
Subject: Re: [PATCH v3 0/6] powernv: cpufreq: Report frequency throttle by OCC

On 4 May 2015 at 14:24, Shilpasri G Bhat <shilpa.bhat@...ux.vnet.ibm.com> wrote:
> This patchset intends to add frequency throttle reporting mechanism
> to powernv-cpufreq driver when OCC throttles the frequency. OCC is an
> On-Chip-Controller which takes care of the power and thermal safety of
> the chip. The CPU frequency can be throttled during an OCC reset or
> when OCC tries to limit the max allowed frequency. The patchset will
> report such conditions so as to keep the user informed about reason
> for the drop in performance of workloads when frequency is throttled.
>
> Changes from v2:
> - Split into multiple patches
> - Semantic fixes
>
> Shilpasri G Bhat (6):
>   cpufreq: poowernv: Handle throttling due to Pmax capping at chip level
>   powerpc/powernv: Add definition of OPAL_MSG_OCC message type
>   cpufreq: powernv: Register for OCC related opal_message notification
>   cpufreq: powernv: Call throttle_check() on receiving OCC_THROTTLE
>   cpufreq: powernv: Report Psafe only if PMSR.psafe_mode_active bit is
>     set
>   cpufreq: powernv: Restore cpu frequency to policy->cur on unthrottling
>
>  arch/powerpc/include/asm/opal-api.h |   8 ++
>  drivers/cpufreq/powernv-cpufreq.c   | 199 +++++++++++++++++++++++++++++++++---
>  2 files changed, 192 insertions(+), 15 deletions(-)

Acked-by: Viresh Kumar <viresh.kumar@...aro.org>
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