linux-kernel - Re: [PATCH] x86: introduce bootmem

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Date:	Fri, 06 Mar 2009 12:40:24 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: introduce bootmem_state -v2

Ingo Molnar wrote:
> * Yinghai Lu <yinghai@...nel.org> wrote:
> 
>> Ingo Molnar wrote:
>>> * Yinghai Lu <yinghai@...nel.org> wrote:
>>>
>>>> Impact: cleanup
>>>>
>>>> extend after_bootmem and after_init_bootmem to bootmem_state
>>>> and will have BEFORE_BOOTMEM, DURING_BOOTMEM, AFTER_BOOTMEM
>>>>
>>>> v2: style changes according to ingo
>>>>
>>>> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
>>>>
>>>> ---
>>>>  arch/x86/kernel/setup.c |    1 +
>>>>  arch/x86/mm/init.c      |   13 +++++++------
>>>>  arch/x86/mm/init_32.c   |   28 ++++++++++++++++++++--------
>>>>  arch/x86/mm/init_64.c   |   33 +++++++++++++++++++--------------
>>>>  include/linux/mm.h      |    9 +++++++++
>>>>  5 files changed, 56 insertions(+), 28 deletions(-)
>>>> Index: linux-2.6/include/linux/mm.h
>>>> ===================================================================
>>>> --- linux-2.6.orig/include/linux/mm.h
>>>> +++ linux-2.6/include/linux/mm.h
>>>> @@ -1067,6 +1067,15 @@ extern void __init mmap_init(void);
>>>>  extern void show_mem(void);
>>>>  extern void si_meminfo(struct sysinfo * val);
>>>>  extern void si_meminfo_node(struct sysinfo *val, int nid);
>>>> +
>>>> +enum bootmem_state {
>>>> +	BEFORE_BOOTMEM,
>>>> +	DURING_BOOTMEM,
>>>> +	AFTER_BOOTMEM
>>>> +};
>>>> +
>>>> +extern enum bootmem_state bootmem_state;
>>>> +
>>>>  extern int after_bootmem;
>>> Btw., the after_bootmem variable itself should either move 
>>> to x86 (and arch/sh), or should be defined in mm/bootmem.c.
>>>
>>> Right now we have this weird mm.h construct that is not 
>>> actually useful to generic code.
>> with this patch, only sh is using after_bootmem. could
>> 1. make sh to use bootmem_state
>> 2. then remove after_bootmem
> 
> Hm, lets leave arch/sh alone for now i think - the commits are 
> desintd for the x86 tree.
> 
> But we should move our after_bootmem to arch/x86/include/ and 
> not pollute mm.h with it. It's an x86 internal detail for now.
> 

you mean move bootmem_state to arch/x86/include ?
with this patch are not using after_bootmem anymore.

YH
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