linux-kernel - Re: [PATCH] mm: sparse: use __aligned() instead of manual padding in mem

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Message-ID: <51A78EC4.4080703@intel.com>
Date:	Thu, 30 May 2013 10:39:16 -0700
From:	Dave Hansen <dave.hansen@...el.com>
To:	Cody P Schafer <cody@...ux.vnet.ibm.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux MM <linux-mm@...ck.org>
Subject: Re: [PATCH] mm: sparse: use __aligned() instead of manual padding
 in mem_section

On 05/29/2013 04:14 PM, Cody P Schafer wrote:
> Instead of leaving a trap for the next person who comes along and wants
> to add something to mem_section, add an __aligned() and remove the
> manual padding added for MEMCG.

It doesn't need to be aligned technically.  It needs to be a power-of-2:

http://lkml.indiana.edu/hypermail/linux/kernel/1205.2/03077.html

I'd be quite happy for someone to resurrect that patch, though.  We need
a big fat comment in there.
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