linux-kernel - Re: [RFC PATCH 2/3] lib/list_batch, x86: Enable list insertion/deletion batching in x86-64

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Date:	Wed, 27 Jan 2016 15:34:51 -0500
From:	Waiman Long <waiman.long@....com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	linux-fsdevel@...r.kernel.org, x86@...nel.org,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Scott J Norton <scott.norton@...com>,
	Douglas Hatch <doug.hatch@...com>
Subject: Re: [RFC PATCH 2/3] lib/list_batch, x86: Enable list insertion/deletion
 batching in x86-64

On 01/26/2016 04:44 PM, Andi Kleen wrote:
> Waiman Long<Waiman.Long@....com>  writes:
>> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
>> index 330e738..443e41d 100644
>> --- a/arch/x86/Kconfig
>> +++ b/arch/x86/Kconfig
>> @@ -42,6 +42,7 @@ config X86
>>   	select ARCH_SUPPORTS_NUMA_BALANCING	if X86_64
>>   	select ARCH_USE_BUILTIN_BSWAP
>>   	select ARCH_USE_CMPXCHG_LOCKREF		if X86_64
>> +	select ARCH_USE_LIST_BATCHING		if X86_64
> I would make it unconditional. The code is simple enough
> and shouldn't have drawbacks on smaller systems.
>
> -Andi

You are probably right. I will look into that.

Cheers,
Longman