linux-kernel - Re: [PATCH 3/3] thermal/intel_powerclamp: Convert to CPU hotplug state

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Message-ID: <20161024095529.2b1855b4@icelake>
Date:   Mon, 24 Oct 2016 09:55:29 -0700
From:   Jacob Pan <jacob.jun.pan@...ux.intel.com>
To:     Petr Mladek <pmladek@...e.com>
Cc:     Zhang Rui <rui.zhang@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Eduardo Valentin <edubezval@...il.com>,
        Tejun Heo <tj@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        jacob.jun.pan@...ux.intel.com
Subject: Re: [PATCH 3/3] thermal/intel_powerclamp: Convert to CPU hotplug
 state

On Mon, 24 Oct 2016 17:48:07 +0200
Petr Mladek <pmladek@...e.com> wrote:

> On Fri 2016-10-21 13:21:18, Jacob Pan wrote:
> > On Mon, 17 Oct 2016 14:32:52 +0200
> > Petr Mladek <pmladek@...e.com> wrote:
> > 
> > > From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
> > > 
> > Hi Sebastian,
> > I applied this patchset on 4.9-rc1 and run some cpu online/offline
> > loops test while injecting idle, e.g. 25%. I got system hang after a
> > few cycles. Still looking into root cause.
> 
> You might need the patch
> ("sched/fair: Fix sched domains NULL deference in
> select_idle_sibling()") from linux-tip, see
> https://lkml.kernel.org/r/tip-9cfb38a7ba5a9c27c1af8093fb1af4b699c0a441@git.kernel.org
> 
> I have mentioned it in the cover letter. I am sorry if it was not
> visible enough.
Thanks for point it out again, I missed it.

Now rc2 has this fix so I tried again cpuhp seems to work well now.

However, I found suspend to ram does not work with this patchset. Have
you  tested it with "echo mem > /sys/power/state" while doing idle
injection?
It fails to enter s3 on my system.