linux-kernel - Re: [PATCH 4/4] intel_idle: Add SPR support with AMX INIT-state

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Date:   Fri, 05 Nov 2021 18:26:27 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     "Bae, Chang Seok" <chang.seok.bae@...el.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        "bp@...en8.de" <bp@...en8.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>
Subject: Re: [PATCH 4/4] intel_idle: Add SPR support with AMX INIT-state

On Fri, Nov 05 2021 at 16:03, Bae, Chang Seok wrote:
> On Nov 5, 2021, at 07:33, Thomas Gleixner <tglx@...utronix.de> wrote:
>> On Thu, Nov 04 2021 at 15:52, Chang S. Bae wrote:
>>> +static __cpuidle int intel_idle_tile(struct cpuidle_device *dev,
>>> +				     struct cpuidle_driver *drv, int index)
>>> +{
>>> +	fpu_idle_fpregs();
>> 
>> That's redundant because arch_cpu_idle_enter() is invoked before the
>> actual idle mechanism. 
>
> I think the way this series is shaped makes confusion, sorry.
>
> Since PATCH3 and PATCH4 are in debate -- which approach should be chosen, it
> was decided to post both and let just one of them be selected. E.g., if PATCH3
> is right, then PATCH4 should be abandoned.

My bad. I should have read the cover letter before complaining.

> I think PATCH3 is better. Maybe PATCH4 should not be sent together to avoid
> such confusion.

Yes. patch 3 is way better than patch 4.

Thanks,

        tglx