linux-kernel - Re: [PATCH v6 4/5] sched: Rename arch_update_thermal_pressure into arch_update_hw

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Date: Tue, 30 Apr 2024 13:23:52 +0200
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Vincent Guittot <vincent.guittot@...aro.org>, linux@...linux.org.uk,
 catalin.marinas@....com, will@...nel.org, sudeep.holla@....com,
 rafael@...nel.org, viresh.kumar@...aro.org, agross@...nel.org,
 andersson@...nel.org, mingo@...hat.com, peterz@...radead.org,
 juri.lelli@...hat.com, dietmar.eggemann@....com, rostedt@...dmis.org,
 bsegall@...gle.com, mgorman@...e.de, bristot@...hat.com,
 vschneid@...hat.com, lukasz.luba@....com, rui.zhang@...el.com,
 mhiramat@...nel.org, daniel.lezcano@...aro.org, amit.kachhap@...il.com,
 corbet@....net, gregkh@...uxfoundation.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 linux-pm@...r.kernel.org, linux-arm-msm@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org, linux-doc@...r.kernel.org
Cc: Qais Yousef <qyousef@...alina.io>, Bjorn Andersson
 <andersson@...nel.org>, Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Subject: Re: [PATCH v6 4/5] sched: Rename arch_update_thermal_pressure into
 arch_update_hw_pressure

On 26.03.2024 10:16 AM, Vincent Guittot wrote:
> Now that cpufreq provides a pressure value to the scheduler, rename
> arch_update_thermal_pressure into HW pressure to reflect that it returns
> a pressure applied by HW (i.e. with a high frequency change) and not
> always related to thermal mitigation but also generated by max current
> limitation as an example. Such high frequency signal needs filtering to be
> smoothed and provide an value that reflects the average available capacity
> into the scheduler time scale.
> 
> Signed-off-by: Vincent Guittot <vincent.guittot@...aro.org>
> Reviewed-by: Qais Yousef <qyousef@...alina.io>
> Reviewed-by: Lukasz Luba <lukasz.luba@....com>
> Tested-by: Lukasz Luba <lukasz.luba@....com>
> ---

Hi, I'm not quite sure how, but this commit specifically breaks booting
on Qualcomm platforms with EAS..

https://pastebin.com/raw/1Uh7u81x

Konrad