linux-kernel - Re: [PATCH v3 0/2] cpufreq: powernv: Redesign the presentation of throttle notification

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Message-ID: <877fjnjj3m.fsf@linux.vnet.ibm.com>
Date:	Wed, 06 Jan 2016 17:51:57 +1100
From:	Stewart Smith <stewart@...ux.vnet.ibm.com>
To:	Shilpasri G Bhat <shilpa.bhat@...ux.vnet.ibm.com>,
	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org
Cc:	viresh.kumar@...aro.org, rjw@...ysocki.net, pc@...ibm.com,
	Shilpasri G Bhat <shilpa.bhat@...ux.vnet.ibm.com>,
	linux-pm@...r.kernel.org
Subject: Re: [PATCH v3 0/2] cpufreq: powernv: Redesign the presentation of throttle notification

Shilpasri G Bhat <shilpa.bhat@...ux.vnet.ibm.com> writes:
> In POWER8, OCC(On-Chip-Controller) can throttle the frequency of the
> CPU when the chip crosses its thermal and power limits. Currently,
> powernv-cpufreq driver detects and reports this event as a console
> message. Some boxes may not sustain the max turbo frequency in all
> conditions and can be throttled frequently. This can lead to the
> flooding of console with throttle messages. So this patchset aims to
> redesign the presentation of this event via sysfs counters and
> tracepoints.

This likely should CC stable@ as we have seen this on some machines, at
least in the lab.

-- 
Stewart Smith
OPAL Architect, IBM.

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