linux-kernel - Re: [PATCH v1] arm64: defconfig: Enable CONFIG

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Message-ID: <CANAwSgTyV-KOhyr3nhxp_W9KDEi4bAX8ET9acMbbn0AQyr2TJQ@mail.gmail.com>
Date: Fri, 27 Sep 2024 09:10:49 +0530
From: Anand Moon <linux.amoon@...il.com>
To: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will@...nel.org>, Sebastian Andrzej Siewior <bigeasy@...utronix.de>, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] arm64: defconfig: Enable CONFIG_EXPERT

Hi Catalin,

On Thu, 26 Sept 2024 at 22:34, Catalin Marinas <catalin.marinas@....com> wrote:
>
> On Thu, Sep 26, 2024 at 08:28:16PM +0530, Anand Moon wrote:
> > Enable CONFIG_EXPERT to allow the configuration of PREEMPT_RT.
> >
> > PREEMPT_RT depends on the following configuration:
> >
> > CONFIG_PREEMPT_RT
> >       bool “Fully Preemptible Kernel (Real-Time)”
> >       depends on CONFIG_EXPERT && ARCH_SUPPORTS_RT
> >       select PREEMPTION
> >
> > Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
> > Signed-off-by: Anand Moon <linux.amoon@...il.com>
> > ---
> >  arch/arm64/configs/defconfig | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
> > index 5fdbfea7a5b2..3d9d29eb0c13 100644
> > --- a/arch/arm64/configs/defconfig
> > +++ b/arch/arm64/configs/defconfig
> > @@ -28,6 +28,7 @@ CONFIG_CGROUP_BPF=y
> >  CONFIG_USER_NS=y
> >  CONFIG_SCHED_AUTOGROUP=y
> >  CONFIG_BLK_DEV_INITRD=y
> > +CONFIG_EXPERT=y
> >  CONFIG_KALLSYMS_ALL=y
> >  CONFIG_PROFILING=y
> >  CONFIG_KEXEC=y
>
> EXPERT is not really for defconfig (at least not for the arm64 one).
> Distros can (and do) enable it if they want. Also PREEMPT_RT is default
> off, so you'd have to enable it in your config anyway, not sure what
> this patch helps with.
>
Ok, I will enable this in my distro config.
> --
> Catalin

Thanks
-Anand