linux-kernel - Re: [PATCH] fs: remove 8 bytes of padding from struct writeback

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Message-ID: <20120425135734.GA4995@localhost>
Date:	Wed, 25 Apr 2012 21:57:34 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Richard Kennedy <richard@....demon.co.uk>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Jan Kara <jack@...e.cz>
Subject: Re: [PATCH] fs: remove 8 bytes of padding from struct
 writeback_control on 64 bit builds

On Wed, Apr 25, 2012 at 02:53:05PM +0100, Richard Kennedy wrote:
> Reorder structure writeback_control to remove 8 bytes of padding on 64
> bit builds, this shrinks its size from 48 to 40 bytes.
> 
> This structure is always on the stack and uses C99 named initialisation,
> so should be safe and have a small impact on stack usage.
>     
> Signed-off-by: Richard Kennedy <richard@....demon.co.uk>
> 
> --
> 
> patch against v3.4-rc4
> compiled and tested on x86_64
> 
> I've been running my desktop with this patch applied for several days
> and have not seen any problems.
> regards
> Richard

Applied, thanks!

Fengguang
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