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Date:   Mon, 13 Nov 2023 12:26:33 +0000
From:   Marc Zyngier <>
To:     Hongyan Xia <>
Cc:     David Dai <>,
        "Rafael J. Wysocki" <>,
        Viresh Kumar <>,
        Rob Herring <>,
        Krzysztof Kozlowski <>,
        Conor Dooley <>,
        Sudeep Holla <>,
        Saravana Kannan <>,
        Quentin Perret <>,
        Masami Hiramatsu <>,
        Will Deacon <>,
        Peter Zijlstra <>,
        Vincent Guittot <>,
        Oliver Upton <>,
        Dietmar Eggemann <>,
        Pavan Kondeti <>,
        Gupta Pankaj <>,
        Mel Gorman <>,,,,
Subject: Re: [PATCH v4 0/2] Improve VM CPUfreq and task placement behavior

On Mon, 13 Nov 2023 12:20:29 +0000,
Hongyan Xia <> wrote:
> Also, my knowledge with KVM is limited. May I know where the vCPU fork
> happens? Can't you just set the p->sched_reset_on_fork flag on fork to
> not carry forward the uclamp values?

There is no "vCPU fork". The vcpu is a VMM (qemu, crosvm, kvmtool)
thread, nothing else.


Without deviation from the norm, progress is not possible.

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