linux-kernel - Re: [RFC][PATCH 5/9] mm: rearrange struct page

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Message-ID: <20140116002001.GC8456@node.dhcp.inet.fi>
Date:	Thu, 16 Jan 2014 02:20:01 +0200
From:	"Kirill A. Shutemov" <kirill@...temov.name>
To:	Dave Hansen <dave@...1.net>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, penberg@...nel.org,
	cl@...ux-foundation.org
Subject: Re: [RFC][PATCH 5/9] mm: rearrange struct page

On Tue, Jan 14, 2014 at 10:00:55AM -0800, Dave Hansen wrote:
> 
> From: Dave Hansen <dave.hansen@...ux.intel.com>
> 
> To make the layout of 'struct page' look nicer, I broke
> up a few of the unions.  But, this has a cost: things that
> were guaranteed to line up before might not any more.  To make up
> for that, some BUILD_BUG_ON()s are added to manually check for
> the alignment dependencies.
> 
> This makes it *MUCH* more clear how the first few fields of
> 'struct page' get used by the slab allocators.
> 
> Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>

Looks much cleaner!

Acked-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

-- 
 Kirill A. Shutemov
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