linux-kernel - Re: [PATCH] mm/memblock: add debug output for the memblock

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Date:	Tue, 31 Mar 2015 16:38:08 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Alexander Kuleshov <kuleshovmail@...il.com>
Cc:	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Philipp Hachtmann <phacht@...ux.vnet.ibm.com>,
	Fabian Frederick <fabf@...net.be>,
	Catalin Marinas <catalin.marinas@....com>,
	Emil Medve <Emilian.Medve@...escale.com>,
	Akinobu Mita <akinobu.mita@...il.com>,
	Tang Chen <tangchen@...fujitsu.com>,
	Tony Luck <tony.luck@...el.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/memblock: add debug output for the memblock_add

On Sat, 28 Mar 2015 23:08:03 +0600 Alexander Kuleshov <kuleshovmail@...il.com> wrote:

> memblock_reserve function calls memblock_reserve_region which
> prints debugging information if 'memblock=debug' passed to the
> command line. This patch adds the same behaviour, but for the 
> memblock_add function.
> 
> Signed-off-by: Alexander Kuleshov <kuleshovmail@...il.com>
> ---
>  mm/memblock.c | 18 ++++++++++++++++--
>  1 file changed, 16 insertions(+), 2 deletions(-)
> 
> diff --git a/mm/memblock.c b/mm/memblock.c
> index 252b77b..c7b8306 100644
> --- a/mm/memblock.c
> +++ b/mm/memblock.c
> @@ -580,10 +580,24 @@ int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size,
>  	return memblock_add_range(&memblock.memory, base, size, nid, 0);
>  }
>  
> +static int __init_memblock memblock_add_region(phys_addr_t base,
> +						phys_addr_t size,
> +						int nid,
> +						unsigned long flags)
> +{
> +	struct memblock_type *_rgn = &memblock.memory;
> +
> +	memblock_dbg("memblock_memory: [%#016llx-%#016llx] flags %#02lx %pF\n",

I guess this should be "memblock_add:".  That's what
memblock_reserve_region() does?

--- a/mm/memblock.c~mm-memblock-add-debug-output-for-the-memblock_add-fix
+++ a/mm/memblock.c
@@ -587,7 +587,7 @@ static int __init_memblock memblock_add_
 {
 	struct memblock_type *_rgn = &memblock.memory;
 
-	memblock_dbg("memblock_memory: [%#016llx-%#016llx] flags %#02lx %pF\n",
+	memblock_dbg("memblock_add: [%#016llx-%#016llx] flags %#02lx %pF\n",
 		     (unsigned long long)base,
 		     (unsigned long long)base + size - 1,
 		     flags, (void *)_RET_IP_);
_

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