linux-kernel - Re: [PATCH] cpuidle-haltpoll: allow force loading on hosts without the REALTIME hint

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Message-ID: <0d6b9b29-964c-72b5-7020-e3ccd66aee3f@maciej.szmigiero.name>
Date:   Fri, 6 Mar 2020 21:11:09 +0100
From:   "Maciej S. Szmigiero" <mail@...iej.szmigiero.name>
To:     Marcelo Tosatti <mtosatti@...hat.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Joao Martins <joao.m.martins@...cle.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: Re: [PATCH] cpuidle-haltpoll: allow force loading on hosts without
 the REALTIME hint

Hi Marcelo,

Thanks for your input.

On 06.03.2020 10:56, Marcelo Tosatti wrote:
(..)
> or even better (but requires more investment)
> 
> 2) Make on the flight dynamic configuration (after all pCPU
> overcommitment=true/false is a property that changes during
> the day, depending on system load).
> 
> But its up to Paolo to decide, really.

I think that for now, to cover the use cases that are described in the
commit message and bring back the functionality that was kind of lost
after commit 1328edca4a14, we should add this module parameter.

Then we can think about some more comprehensive solution.

Thanks,
Maciej