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

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Date:	Sat, 03 Oct 2009 19:29:47 +0900
From:	Tejun Heo <tj@...nel.org>
To:	cl@...ux-foundation.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()

cl@...ux-foundation.org wrote:
> Explicitly initialize the pagesets after the per cpu areas have been
> initialized. This is necessary in order to be able to use per cpu
> operations in later patches.
> 
> Cc: Mel Gorman <mel@....ul.ie>
> Signed-off-by: Christoph Lameter <cl@...ux-foundation.org>
> 
> ---
>  arch/ia64/kernel/setup.c       |    1 +
>  arch/powerpc/kernel/setup_64.c |    1 +
>  arch/sparc/kernel/smp_64.c     |    1 +
>  arch/x86/kernel/setup_percpu.c |    2 ++
>  include/linux/mm.h             |    1 +
>  mm/page_alloc.c                |   40 +++++++++++++++++++++++++++++-----------
>  mm/percpu.c                    |    2 ++

Hmmm... why not call this function from start_kernel() after calling
setup_per_cpu_areas() instead of modifying every implementation of
setup_per_cpu_areas()?

Thanks.

-- 
tejun
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