linux-kernel - Re: [PATCH] modules: Use a better scheme for refcounting

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Message-ID: <Pine.LNX.4.64.0805190938240.18382@schroedinger.engr.sgi.com>
Date:	Mon, 19 May 2008 09:39:02 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Rusty Russell <rusty@...tcorp.com.au>
cc:	Mike Travis <travis@....com>, Eric Dumazet <dada1@...mosbay.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] modules: Use a better scheme for refcounting

On Sat, 17 May 2008, Rusty Russell wrote:

> > > You mean using alloc_percpu() ? Problem is that current implementation
> > > is expensive,
> 
> I mean rewriting alloc_percpu :)

cpu_alooc is going to replace that completely.
> 
> > > We probably can change this to dynamic per-cpu as soon as Mike or
> > > Christopher finish their work on new dynamic per-cpu implementation ?
> >
> > Yes, the zero-based percpu variables followed by the cpu_alloc patch should
> > provide this and shrink the code quite well, including in some cases
> > removing locking requirements (because the resultant instructions will be
> > atomic.)
> 
> Ah, I hadn't realized that Mike was already working on this.  Mike, have you 
> published patches already?

He is reworking my patches. He can use some encouragement though...

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