linux-kernel - RE: [PATCH] mm/slub.c: Use print_hex

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Date:	Wed, 20 May 2009 15:18:22 -0400
From:	"H Hartley Sweeten" <hartleys@...ionengravers.com>
To:	"Joe Perches" <joe@...ches.com>,
	"Christoph Lameter" <cl@...ux-foundation.org>
Cc:	<linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
	"Matt Mackall" <mpm@...enic.com>,
	"Pekka Enberg" <penberg@...helsinki.fi>,
	"Ingo Molnar" <mingo@...e.hu>,
	"David Rientjes" <rientjes@...gle.com>,
	"Eduard - Gabriel Munteanu" <eduard.munteanu@...ux360.ro>
Subject: RE: [PATCH] mm/slub.c: Use print_hex_dump and remove unnecessary cast

On Wednesday, May 20, 2009 11:43 AM, Joe Perches wrote:
> On Wed, 2009-05-20 at 14:23 -0400, Christoph Lameter wrote:
>> This was discussed before.
>> http://lkml.indiana.edu/hypermail/linux/kernel/0705.3/2671.html
>
> You've got a good memory.
>
>> Was hexdump changed?
>
> It seems not.
>
>> How does the output look after this change?
>>
>> From reading the code, the last column is unaligned.
>
> I did submit a patch to fix hexdump once.
> http://lkml.org/lkml/2007/12/6/304

>From what I can tell the current code does properly align the
ascii output.

I just chopped the necessary functions out of the kernel and
created a test program.  If I pass the string:

"This is a sample buffer"

I get the following output:

prefix_type = DUMP_PREFIX_NONE

<7>buffer: 54 68 69 73 20 69 73 20 61 20 73 61 6d 70 6c 65  This is a sample
<7>buffer: 20 62 75 66 66 65 72                              buffer

prefix_type = DUMP_PREFIX_ADDRESS

<7>buffer: 0x804a008: 54 68 69 73 20 69 73 20 61 20 73 61 6d 70 6c 65  This is a sample
<7>buffer: 0x804a018: 20 62 75 66 66 65 72                              buffer

prefix_type = DUMP_PREFIX_OFFSET

<7>buffer: 00000000: 54 68 69 73 20 69 73 20 61 20 73 61 6d 70 6c 65  This is a sample
<7>buffer: 00000010: 20 62 75 66 66 65 72                              buffer

Regards,
Hartley
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