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Message-ID: <466E05F5.3090501@garzik.org> Date: Mon, 11 Jun 2007 22:33:25 -0400 From: Jeff Garzik <jeff@...zik.org> To: Tejun Heo <htejun@...il.com> CC: 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, arjan@...ux.intel.com Subject: Re: [patch 0/3] AHCI Link Power Management Tejun Heo wrote: > Kristen Carlson Accardi wrote: >> Hi, >> This series of patches enables Aggressive Link Power Management for AHCI >> devices, as documented in the AHCI spec. On my laptop (a Lenovo X60), this >> saves me a full watt of power. On other systems, reported power savings >> range from .5-1.5 Watts. It has been tested by the kind folks at #powertop >> with similar results. Please give it a try and let me know what you think. > > I'm not sure about this. We need better PM framework to support > powersaving in other controllers and some ahcis don't save much when > only link power management is used, they need to be turned off A better PM framework would definitely be nice :) > completely && I don't think scsi sysfs is the right place to export this > interface. That's about the only place we have right now. Jeff - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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