linux-kernel - Re: [PATCH 0/2] arm64: cpuidle: make arm_cpuidle

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Message-ID: <20160324111507.GB9323@arm.com>
Date:	Thu, 24 Mar 2016 11:15:07 +0000
From:	Will Deacon <will.deacon@....com>
To:	Jisheng Zhang <jszhang@...vell.com>
Cc:	catalin.marinas@....com, lorenzo.pieralisi@....com,
	daniel.lezcano@...aro.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] arm64: cpuidle: make arm_cpuidle_suspend() more
 efficient

On Thu, Mar 24, 2016 at 01:08:48PM +0800, Jisheng Zhang wrote:
> This series is to improve the arm_cpuidle_suspend() a bit by removing/moving
> out checks from this hot path.
> 
> Jisheng Zhang (2):
>   arm64: cpuidle: remove cpu_ops check from arm_cpuidle_suspend()
>   arm64: cpuidle: make arm_cpuidle_suspend() a bit more efficient
> 
>  arch/arm64/kernel/cpuidle.c | 9 ++-------
>  1 file changed, 2 insertions(+), 7 deletions(-)

These look fine to me, but do you have any rough numbers showing what
sort of improvement we get from this change?

Will