linux-kernel - Re: [PATCH] libata: reorder ata_queued_cmd to remove alignment padding on 64 bit builds

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Message-ID: <4C9306FF.70202@pobox.com>
Date:	Fri, 17 Sep 2010 02:13:19 -0400
From:	Jeff Garzik <jgarzik@...ox.com>
To:	Richard Kennedy <richard@....demon.co.uk>
CC:	Tejun Heo <tj@...nel.org>, lkml <linux-kernel@...r.kernel.org>,
	linux-ide@...r.kernel.org
Subject: Re: [PATCH] libata: reorder ata_queued_cmd to remove alignment padding
 on 64 bit builds

On 09/10/2010 07:19 AM, Richard Kennedy wrote:
> Reorder structure ata_queued_cmd to remove 8 bytes of alignment padding
> on 64 bit builds&  therefore reduce the size of structure ata_port by
> 256 bytes.
>
> Overall this will have little impact, other than reducing the amount of
> memory that is cleared when allocating ata_ports.
>
> Signed-off-by: Richard Kennedy<richard@....demon.co.uk>
> ----
> patch against 2.6.36-rc3
> compiled&  tested on x86_64
>
> I've been running this patch for a couple of weeks with no apparent
> issues.
>
> regards

applied


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