linux-kernel - Re: [patch 3/3] Enable Aggressive Link Power management for AHCI controllers.

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Message-ID: <466E1A32.90306@linux.intel.com>
Date:	Mon, 11 Jun 2007 20:59:46 -0700
From:	Arjan van de Ven <arjan@...ux.intel.com>
To:	Henrique de Moraes Holschuh <hmh@....eng.br>
CC:	Jeff Garzik <jeff@...zik.org>,
	Dagfinn Ilmari Mannsåker 
	<ilmari@...ari.org>,
	Kristen Carlson Accardi <kristen.c.accardi@...el.com>,
	james.bottomley@...eleye.com, linux-ide@...r.kernel.org,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	htejun@...il.com
Subject: Re: [patch 3/3] Enable Aggressive Link Power management for AHCI
 controllers.

Henrique de Moraes Holschuh wrote:
> On Mon, 11 Jun 2007, Jeff Garzik wrote:
>>>> on/off doesn't really make sense if the question is "do you favor power
>>>> or do you favor performance".......
> 
> Actually, it does if you think of it as "do you need hotplug right now or
> not?".

that's a temporary shortcoming; even with these power savings you can 
do hotplug as long as you're willing to poll for it at a reasonable 
interval and are willing to wait the time between polls for a hotplug 
to take effect..
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