linux-kernel - Re: [PATCH] Make x86 latest boot with non-discontig boxes

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Message-ID: <86802c440806032151l5faedf22xe0107d4c99c55c21@mail.gmail.com>
Date:	Tue, 3 Jun 2008 21:51:55 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Glauber Costa" <gcosta@...hat.com>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	tglx@...utronix.de, mingo@...e.hu
Subject: Re: [PATCH] Make x86 latest boot with non-discontig boxes

On Tue, Jun 3, 2008 at 9:08 PM, Glauber Costa <gcosta@...hat.com> wrote:
> Commit 0596152388e234efebce464355186ad9e16c8cb6
> broke my box, since it removes completely the call to
> memory_present() at e820 setup.
>
> It seems to be really not needed with discontig memory,
> but with flat and sparse, I get an early crash. The proposed patch
> moves the call memory_present() to setup_memory, the one
> present in setup_32.c.
>
> Signed-off-by: Glauber Costa <gcosta@...hat.com>
> CC: Yinghai Lu <yhlu.kernel@...il.com>
> ---
>  arch/x86/kernel/setup_32.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
>
> diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
> index 2901042..841eb2f 100644
> --- a/arch/x86/kernel/setup_32.c
> +++ b/arch/x86/kernel/setup_32.c
> @@ -388,6 +388,8 @@ static unsigned long __init setup_memory(void)
>  #ifdef CONFIG_FLATMEM
>        max_mapnr = num_physpages;
>  #endif
> +       memory_present(0, 0, max_pfn);
> +
>        printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
>                        pages_to_mb(max_low_pfn));
>
> --
thanks

http://lkml.org/lkml/2008/6/3/229
[PATCH] x86: change propagate_e820_map back to find_max_pfn -32bit - fix

already address that.

YH
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