linux-kernel - Re: [PATCH 14/22] lmb: Add lmb_memory

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Date:	Mon, 10 May 2010 16:25:26 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Miller <davem@...emloft.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [PATCH 14/22] lmb: Add lmb_memory_size()

On Sat, 2010-05-08 at 08:17 -0700, Yinghai Lu wrote:
> It will return memory size in specified range according to lmb.memory.region
> 
> Try to share some code with lmb_free_memory_size() by passing get_free to
> __lmb_memory_size().

Similar comment about name and purpose.

Cheers,
Ben.

> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
> ---
>  include/linux/lmb.h |    1 +
>  mm/lmb.c            |   18 +++++++++++++++++-
>  2 files changed, 18 insertions(+), 1 deletions(-)
> 
> diff --git a/include/linux/lmb.h b/include/linux/lmb.h
> index 22be96d..90022c1 100644
> --- a/include/linux/lmb.h
> +++ b/include/linux/lmb.h
> @@ -102,6 +102,7 @@ void lmb_register_active_regions(int nid, unsigned long start_pfn,
>  					 unsigned long last_pfn);
>  u64 lmb_hole_size(u64 start, u64 end);
>  u64 lmb_free_memory_size(u64 addr, u64 limit);
> +u64 lmb_memory_size(u64 addr, u64 limit);
>  
>  #include <asm/lmb.h>
>  
> diff --git a/mm/lmb.c b/mm/lmb.c
> index 4bc125c..2870dd9 100644
> --- a/mm/lmb.c
> +++ b/mm/lmb.c
> @@ -746,7 +746,7 @@ void __init lmb_to_bootmem(u64 start, u64 end)
>  }
>  #endif
>  
> -u64 __init lmb_free_memory_size(u64 addr, u64 limit)
> +static u64 __init __lmb_memory_size(u64 addr, u64 limit, bool get_free)
>  {
>  	int i, count;
>  	struct range *range;
> @@ -776,6 +776,10 @@ u64 __init lmb_free_memory_size(u64 addr, u64 limit)
>  	}
>  	subtract_range(range, count, 0, addr);
>  	subtract_range(range, count, limit, -1ULL);
> +
> +	/* Subtract lmb.reserved.region in range ? */
> +	if (!get_free)
> +		goto sort_and_count_them;
>  	for (i = 0; i < lmb.reserved.cnt; i++) {
>  		struct lmb_property *r = &lmb.reserved.region[i];
>  
> @@ -788,6 +792,8 @@ u64 __init lmb_free_memory_size(u64 addr, u64 limit)
>  
>  		subtract_range(range, count, final_start, final_end);
>  	}
> +
> +sort_and_count_them:
>  	nr_range = clean_sort_range(range, count);
>  
>  	free_size = 0;
> @@ -797,6 +803,16 @@ u64 __init lmb_free_memory_size(u64 addr, u64 limit)
>  	return free_size << PAGE_SHIFT;
>  }
>  
> +u64 __init lmb_free_memory_size(u64 addr, u64 limit)
> +{
> +	return __lmb_memory_size(addr, limit, true);
> +}
> +
> +u64 __init lmb_memory_size(u64 addr, u64 limit)
> +{
> +	return __lmb_memory_size(addr, limit, false);
> +}
> +
>  u64 __init __weak __lmb_find_area(u64 ei_start, u64 ei_last, u64 start, u64 end,
>  				 u64 size, u64 align)
>  {


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