netdev - Re: [PATCH] percpu: add optimized generic percpu accessors

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Message-ID: <20090116001824.GA9221@gondor.apana.org.au>
Date:	Fri, 16 Jan 2009 11:18:24 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	akpm@...ux-foundation.org, tj@...nel.org, hpa@...or.com,
	brgerst@...il.com, ebiederm@...ssion.com, cl@...ux-foundation.org,
	rusty@...tcorp.com.au, travis@....com,
	linux-kernel@...r.kernel.org, steiner@....com, hugh@...itas.com,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH] percpu: add optimized generic percpu accessors

On Fri, Jan 16, 2009 at 01:15:44AM +0100, Ingo Molnar wrote:
>
> > So if you could design the API such that we have a variant of add/inc 
> > that automatically disables/enables preemption then we can optimise that 
> > away on x86.
> 
> Yeah. percpu_add(var, 1) does exactly that on x86.

Awesome! Sounds like we can finally do away with those nasty
hacks in the SNMP macros.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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