linux-kernel - Re: [PATCH 0/3] cpuidle: Rework the handling of the poll state

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Date:   Mon, 28 Aug 2017 23:17:43 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Sudeep Holla <sudeep.holla@....com>
Cc:     Linux PM <linux-pm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Len Brown <len.brown@...el.com>,
        Linux ACPI <linux-acpi@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>
Subject: Re: [PATCH 0/3] cpuidle: Rework the handling of the poll state

On Thursday, August 24, 2017 11:48:19 AM CEST Sudeep Holla wrote:
> 
> On 23/08/17 22:18, Rafael J. Wysocki wrote:
> > Hi,
> > 
> > On x86 the fist idle state is a polling one, but the way it is set up is far
> > from straightforward and then it is avoided by governors in rather somewhat
> > convoluted fashion.
> > 
> > Make this more clear by explicitly flagging that state as "polling" and
> > checking its flag where it needs to be avoided instead of using
> > arch-dependent numbering of idle states (patch [1/3]), move the
> > polling state code from driver.c to a separate C file (patch [2/3]) and
> > move the initialization of it from the core to the relevant cpuidle drivers -
> > ACPI and intel_idle (patch [3/3]).
> > 
> 
> Tested this on ARM64 platform(both DT and ACPI/LPI) and everything
> continues to work fine.
> Tested-by: Sudeep Holla <sudeep.holla@....com>

Thanks Sudeep!

I haven't seen any more comments on this which I'm taking as a green light for
it, so I'm going to queue it up for 4.14.

Thanks,
Rafael