linux-kernel - Re: [PATCH] ata: ahci: power off unused ports

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Message-ID: <20080527030854.GC7515@mit.edu>
Date:	Mon, 26 May 2008 23:08:54 -0400
From:	Theodore Tso <tytso@....edu>
To:	Kristen Carlson Accardi <kristen.c.accardi@...el.com>
Cc:	jeff@...zik.org, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ata: ahci: power off unused ports

On Thu, May 08, 2008 at 04:10:08PM -0700, Kristen Carlson Accardi wrote:
> power off unused ports
> 
> If the port isn't either a drive bay or an external SATA port, do not 
> keep the phy powered on if the port is unoccupied. This saves .75 watts
> on most laptops.  A module parameter can be used to override this 
> behavior and allow the phy's to be powered up regardless of whether it
> has externally accessible SATA ports. 
> 
> Signed-off-by:  Kristen Carlson Accardi <kristen.c.accardi@...el.com>

Hi,

I'm wondering what's the status of this patch?  

if this has hit a subsystem tree yet?  0.75 watts power savings sounds
really cool, but it doesn't seem to be in Linus's mainline yet.  Has
it hit a subsystem tree yet, or is there some issue that still needs
to be resolved before it can go it?

Thanks, regards,

							- Ted
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