linux-kernel - [PATCH] arm64: make SCHED

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Message-ID: <SL2PR06MB3082B7CCDC47E2E9CAF64F08BDF79@SL2PR06MB3082.apcprd06.prod.outlook.com>
Date:   Fri, 22 Apr 2022 01:58:00 +0000
From:   王擎 <wangqing@...o.com>
To:     Will Deacon <will@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Catalin Marinas <catalin.marinas@....com>
Subject: [PATCH] arm64: make SCHED_CLUSTER depend on ACPI

Hi Catalin, Will, Vincent, Dietmar:

What's your opinion on this patch, and I sent another patch 
"Add complex scheduler level for arm64" yesterday,

Can someone make some comments so things can move forward.

Thanks,
Qing

>cls is made up of sd through cluster_sibling, which is set by cluster_id,
>cluster_id is only provided by ACPI, DT just provide package_id.
>
>So, SCHED_CLUSTER depends on ACPI actually.
>
>Signed-off-by: wangqing <11112896@...tel.com>
>---
> arch/arm64/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
>diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
>index 25b33feed800..edbe035cb0e3 100644
>--- a/arch/arm64/Kconfig
>+++ b/arch/arm64/Kconfig
>@@ -1199,6 +1199,7 @@ config SCHED_MC
> 
> config SCHED_CLUSTER
>         bool "Cluster scheduler support"
>+       depends on ACPI
>         help
>           Cluster scheduler support improves the CPU scheduler's decision
>           making when dealing with machines that have clusters of CPUs.
>-- 
>2.7.4