[PATCH] arm64: defaults NR_CPUS to 256

[PATCH] arm64: defaults NR_CPUS to 256

[Mark Rutland]

There are shipping arm64 platforms with 256 hardware threads. So that we
can make use of these with defconfig, bump the arm64 default NR_CPUS to
256.

At the same time, drop a redundant comment. We only have one default for
NR_CPUS, so there's nothing to sort.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
---
 arch/arm64/Kconfig | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index a4168d366127..4cad67b9ec0a 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -792,8 +792,7 @@ config SCHED_SMT
 config NR_CPUS
 	int "Maximum number of CPUs (2-4096)"
 	range 2 4096
-	# These have to remain sorted largest to smallest
-	default "64"
+	default "256"
 
 config HOTPLUG_CPU
 	bool "Support for hot-pluggable CPUs"
-- 
2.11.0


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Re: [PATCH] arm64: defaults NR_CPUS to 256

[Will Deacon]

On Mon, Jan 14, 2019 at 11:41:25AM +0000, Mark Rutland wrote:
> There are shipping arm64 platforms with 256 hardware threads. So that we
> can make use of these with defconfig, bump the arm64 default NR_CPUS to
> 256.
> 
> At the same time, drop a redundant comment. We only have one default for
> NR_CPUS, so there's nothing to sort.
> 
> Signed-off-by: Mark Rutland <mark.rutland@arm.com>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will.deacon@arm.com>
> ---
>  arch/arm64/Kconfig | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index a4168d366127..4cad67b9ec0a 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -792,8 +792,7 @@ config SCHED_SMT
>  config NR_CPUS
>  	int "Maximum number of CPUs (2-4096)"
>  	range 2 4096
> -	# These have to remain sorted largest to smallest
> -	default "64"
> +	default "256"

Acked-by: Will Deacon <will.deacon@arm.com>

Will

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Re: [PATCH] arm64: defaults NR_CPUS to 256

[Mark Rutland]

On Mon, Jan 14, 2019 at 11:50:35AM +0000, Will Deacon wrote:
> On Mon, Jan 14, 2019 at 11:41:25AM +0000, Mark Rutland wrote:
> > There are shipping arm64 platforms with 256 hardware threads. So that we
> > can make use of these with defconfig, bump the arm64 default NR_CPUS to
> > 256.
> > 
> > At the same time, drop a redundant comment. We only have one default for
> > NR_CPUS, so there's nothing to sort.
> > 
> > Signed-off-by: Mark Rutland <mark.rutland@arm.com>
> > Cc: Catalin Marinas <catalin.marinas@arm.com>
> > Cc: Will Deacon <will.deacon@arm.com>
> > ---
> >  arch/arm64/Kconfig | 3 +--
> >  1 file changed, 1 insertion(+), 2 deletions(-)
> > 
> > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> > index a4168d366127..4cad67b9ec0a 100644
> > --- a/arch/arm64/Kconfig
> > +++ b/arch/arm64/Kconfig
> > @@ -792,8 +792,7 @@ config SCHED_SMT
> >  config NR_CPUS
> >  	int "Maximum number of CPUs (2-4096)"
> >  	range 2 4096
> > -	# These have to remain sorted largest to smallest
> > -	default "64"
> > +	default "256"
> 
> Acked-by: Will Deacon <will.deacon@arm.com>

Cheers!

Catalin, assuming you'll pick this up, could you please correct the
title with s/defaults/default/ ?

... or if you prefer, I can resend with that corrected.

Mark.

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Re: [PATCH] arm64: defaults NR_CPUS to 256

[Catalin Marinas]

On Mon, Jan 14, 2019 at 12:00:33PM +0000, Mark Rutland wrote:
> On Mon, Jan 14, 2019 at 11:50:35AM +0000, Will Deacon wrote:
> > On Mon, Jan 14, 2019 at 11:41:25AM +0000, Mark Rutland wrote:
> > > There are shipping arm64 platforms with 256 hardware threads. So that we
> > > can make use of these with defconfig, bump the arm64 default NR_CPUS to
> > > 256.
> > > 
> > > At the same time, drop a redundant comment. We only have one default for
> > > NR_CPUS, so there's nothing to sort.
> > > 
> > > Signed-off-by: Mark Rutland <mark.rutland@arm.com>
> > > Cc: Catalin Marinas <catalin.marinas@arm.com>
> > > Cc: Will Deacon <will.deacon@arm.com>
> > > ---
> > >  arch/arm64/Kconfig | 3 +--
> > >  1 file changed, 1 insertion(+), 2 deletions(-)
> > > 
> > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> > > index a4168d366127..4cad67b9ec0a 100644
> > > --- a/arch/arm64/Kconfig
> > > +++ b/arch/arm64/Kconfig
> > > @@ -792,8 +792,7 @@ config SCHED_SMT
> > >  config NR_CPUS
> > >  	int "Maximum number of CPUs (2-4096)"
> > >  	range 2 4096
> > > -	# These have to remain sorted largest to smallest
> > > -	default "64"
> > > +	default "256"
> > 
> > Acked-by: Will Deacon <will.deacon@arm.com>
> 
> Cheers!
> 
> Catalin, assuming you'll pick this up, could you please correct the
> title with s/defaults/default/ ?
> 
> ... or if you prefer, I can resend with that corrected.

Queued for 5.1 (with title corrected). Thanks.

-- 
Catalin

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