linux-kernel - Re: [patch V3] percpu_counter: scalability works

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Message-ID: <20110517140233.GP20624@htj.dyndns.org>
Date:	Tue, 17 May 2011 16:02:33 +0200
From:	Tejun Heo <tj@...nel.org>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	Shaohua Li <shaohua.li@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"npiggin@...nel.dk" <npiggin@...nel.dk>
Subject: Re: [patch V3] percpu_counter: scalability works

Hey,

On Tue, May 17, 2011 at 08:55:33AM -0500, Christoph Lameter wrote:
> Well lets just adopt the system that vm statistics use. Bound the error by
> time and batch and allow the user to change the batch if more accuracy is
> desired.

Yeah, that would be the better long term solution.

> The _sum function is optional and should it should be explained that the
> result *could* be better but dont count on it.

We can implement force-flush for dire situations, similar to expedited
RCU flush thing.

Thanks.

-- 
tejun
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