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

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Message-ID: <20090306201503.GC4278@elte.hu>
Date:	Fri, 6 Mar 2009 21:15:03 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Yinghai Lu <yinghai@...nel.org>
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


* 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.

	Ingo
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