linux-kernel - Re: [cpuops cmpxchg double V3 3/5] Generic support for this_cpu_cmpxchg

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Message-ID: <alpine.DEB.2.00.1102251457160.7359@router.home>
Date:	Fri, 25 Feb 2011 14:58:02 -0600 (CST)
From:	Christoph Lameter <cl@...ux.com>
To:	Steven Rostedt <rostedt@...dmis.org>
cc:	Tejun Heo <tj@...nel.org>, akpm@...ux-foundation.org,
	Pekka Enberg <penberg@...helsinki.fi>,
	linux-kernel@...r.kernel.org,
	Eric Dumazet <eric.dumazet@...il.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Subject: Re: [cpuops cmpxchg double V3 3/5] Generic support for
 this_cpu_cmpxchg_double

On Fri, 25 Feb 2011, Steven Rostedt wrote:

> I was thinking that if these are per_cpu then they would be global and
> thus constant. But those are done at link time, which is too late.

Well per_cpu data can also be dynamically allocated via alloc_percpu.
Which is the use case here.

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