linux-kernel - Re: [this_cpu_xx V4 12/20] Move early initialization of pagesets out of zone_wait_table

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Date:	Mon, 5 Oct 2009 11:28:55 -0400 (EDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Tejun Heo <tj@...nel.org>
cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	Mel Gorman <mel@....ul.ie>, mingo@...e.hu,
	rusty@...tcorp.com.au, Pekka Enberg <penberg@...helsinki.fi>
Subject: Re: [this_cpu_xx V4 12/20] Move early initialization of pagesets
 out of zone_wait_table_init()

On Tue, 6 Oct 2009, Tejun Heo wrote:

> > There are various arch implementations that do their own implementation of
> > setup_per_cpu_areas() at their own time (Check sparc and ia64 for
> > example).
>
> sparc is doing everything on setup_per_cpu_areas().  ia64 is an
> exception.  Hmmm... I really don't like scattering mostly unrelated
> init call to every setup_per_cpu_areas() implementation.  How about
> adding "static bool initialized __initdata" to the function and allow
> it to be called earlier when necessary (only ia64 at the moment)?

It would be best to consolidate all setup_per_cpu_areas() to work at the
same time during bootup. How about having a single setup_per_cpu_areas()
function and then within the function allow arch specific processing. Try
to share as much code as possible?

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