linux-kernel - Re: [PATCH 8/9] v3 Define memory_block_size_bytes for x86_64 with CONFIG_X86

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Date:	Fri, 1 Oct 2010 13:57:46 -0500
From:	Robin Holt <holt@....com>
To:	Nathan Fontenot <nfont@...tin.ibm.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linuxppc-dev@...ts.ozlabs.org, Greg KH <greg@...ah.com>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Robin Holt <holt@....com>, steiner@....com
Subject: Re: [PATCH 8/9] v3 Define memory_block_size_bytes for x86_64 with
 CONFIG_X86_UV set

On Fri, Oct 01, 2010 at 01:37:05PM -0500, Nathan Fontenot wrote:
> Define a version of memory_block_size_bytes for x86_64 when CONFIG_X86_UV is
> set.
> 
> Signed-off-by: Robin Holt <holt@....com>
> Signed-off-by: Jack Steiner <steiner@....com>

I think this technically needs a Signed-off-by: <you> since you
are passing it upstream.

> 
> ---
>  arch/x86/mm/init_64.c |   14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> Index: linux-next/arch/x86/mm/init_64.c
> ===================================================================
> --- linux-next.orig/arch/x86/mm/init_64.c	2010-09-29 14:56:25.000000000 -0500
> +++ linux-next/arch/x86/mm/init_64.c	2010-10-01 13:00:50.000000000 -0500
> @@ -51,6 +51,7 @@
>  #include <asm/numa.h>
>  #include <asm/cacheflush.h>
>  #include <asm/init.h>
> +#include <asm/uv/uv.h>
>  #include <linux/bootmem.h>
>  
>  static int __init parse_direct_gbpages_off(char *arg)
> @@ -902,6 +903,19 @@
>  	return NULL;
>  }
>  
> +#ifdef CONFIG_X86_UV
> +#define MIN_MEMORY_BLOCK_SIZE   (1 << SECTION_SIZE_BITS)
> +
> +unsigned long memory_block_size_bytes(void)
> +{
> +	if (is_uv_system()) {
> +		printk(KERN_INFO "UV: memory block size 2GB\n");
> +		return 2UL * 1024 * 1024 * 1024;
> +	}
> +	return MIN_MEMORY_BLOCK_SIZE;
> +}
> +#endif
> +
>  #ifdef CONFIG_SPARSEMEM_VMEMMAP
>  /*
>   * Initialise the sparsemem vmemmap using huge-pages at the PMD level.
> 
--
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