linux-kernel - Re: [PATCH 18/25] x86, lmb: Use lmb_debug to control debug message print out

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Date:	Tue, 29 Jun 2010 11:58:52 -0600
From:	Bjorn Helgaas <bjorn.helgaas@...com>
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>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [PATCH 18/25] x86, lmb: Use lmb_debug to control debug message print out

On Tuesday, June 22, 2010 11:26:47 am Yinghai Lu wrote:
> Also let lmb_reserve_range/lmb_free_range could print out name if lmb=debug is
> specified
> 
> will also print ther name when reserve_lmb_area/free_lmb_area are called.
> 
> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
> ---
>  arch/x86/mm/lmb.c |   24 ++++++++++++++++++------
>  1 files changed, 18 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/x86/mm/lmb.c b/arch/x86/mm/lmb.c
> index bd2f60b..209f25b 100644
> --- a/arch/x86/mm/lmb.c
> +++ b/arch/x86/mm/lmb.c
> @@ -122,10 +122,12 @@ static void __init subtract_lmb_reserved(struct range *range, int az)
>  
>  	count  = lmb.reserved.cnt;
>  
> -	pr_info("Subtract (%d early reservations)\n", count);
> +	if (lmb_debug)
> +		pr_info("Subtract (%d early reservations)\n", count);
>  
>  	for_each_lmb(reserved, r) {
> -		pr_info("  [%010llx - %010llx]\n", (u64)r->base, (u64)r->base + r->size);

Use %pR format (looks like this is rework on top of a previous patch,
so this comment is probably redundant).

> +		if (lmb_debug)
> +			pr_info("  [%010llx - %010llx]\n", (u64)r->base, (u64)r->base + r->size);
>  		final_start = PFN_DOWN(r->base);
>  		final_end = PFN_UP(r->base + r->size);
>  		if (final_start >= final_end)
> @@ -198,16 +200,20 @@ void __init lmb_to_bootmem(u64 start, u64 end)
>  		lmb_free(__pa(lmb.reserved.regions), sizeof(struct lmb_region) * lmb.reserved.max);
>  
>  	count  = lmb.reserved.cnt;
> -	pr_info("(%d early reservations) ==> bootmem [%010llx - %010llx]\n", count, start, end);
> +	if (lmb_debug)
> +		pr_info("(%d early reservations) ==> bootmem [%010llx - %010llx]\n", count, start, end);
>  	for_each_lmb(reserved, r) {
> -		pr_info("  [%010llx - %010llx] ", (u64)r->base, (u64)r->base + r->size);
> +		if (lmb_debug)
> +			pr_info("  [%010llx - %010llx] ", (u64)r->base, (u64)r->base + r->size);
>  		final_start = max(start, r->base);
>  		final_end = min(end, r->base + r->size);
>  		if (final_start >= final_end) {
> -			pr_cont("\n");
> +			if (lmb_debug)
> +				pr_cont("\n");
>  			continue;
>  		}
> -		pr_cont(" ==> [%010llx - %010llx]\n", final_start, final_end);
> +		if (lmb_debug)
> +			pr_cont(" ==> [%010llx - %010llx]\n", final_start, final_end);
>  		reserve_bootmem_generic(final_start, final_end - final_start, BOOTMEM_DEFAULT);
>  	}
>  
> @@ -289,6 +295,9 @@ void __init lmb_reserve_range(u64 start, u64 end, char *name)
>  	if (WARN_ONCE(start > end, "lmb_reserve_range: wrong range [%#llx, %#llx]\n", start, end))
>  		return;
>  
> +	if (lmb_debug)
> +		pr_info("    lmb_reserve_range: [%010llx, %010llx] %16s\n", start, end, name);
> +
>  	lmb_reserve(start, end - start);
>  }
>  
> @@ -300,6 +309,9 @@ void __init lmb_free_range(u64 start, u64 end)
>  	if (WARN_ONCE(start > end, "lmb_free_range: wrong range [%#llx, %#llx]\n", start, end))
>  		return;
>  
> +	if (lmb_debug)
> +		pr_info("       lmb_free_range: [%010llx, %010llx]\n", start, end);
> +
>  	lmb_free(start, end - start);
>  }
>  
> 
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