linux-kernel - Re: [PATCH 3 of 4] sparsemem: reduce i386 PAE section size

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Date:	Fri, 28 Mar 2008 09:45:08 -0700
From:	Dave Hansen <dave@...ux.vnet.ibm.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Yasunori Goto <y-goto@...fujitsu.com>,
	Christoph Lameter <clameter@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andy Whitcroft <apw@...dowen.org>
Subject: Re: [PATCH 3 of 4] sparsemem: reduce i386 PAE section size

On Thu, 2008-03-27 at 17:28 -0700, Jeremy Fitzhardinge wrote:
> diff --git a/include/asm-x86/sparsemem.h b/include/asm-x86/sparsemem.h
> --- a/include/asm-x86/sparsemem.h
> +++ b/include/asm-x86/sparsemem.h
> @@ -16,7 +16,7 @@
> 
>  #ifdef CONFIG_X86_32
>  # ifdef CONFIG_X86_PAE
> -#  define SECTION_SIZE_BITS    30
> +#  define SECTION_SIZE_BITS    29
>  #  define MAX_PHYSADDR_BITS    36
>  #  define MAX_PHYSMEM_BITS     36
>  # else

This is fine with me as long as we have the room in page->flags.  I
probably need to look at Christoph's new patches, too.

-- Dave

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