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Date: Wed, 2 Nov 2011 08:17:11 -0700 From: Tejun Heo <tj@...nel.org> To: Lin Ming <ming.m.lin@...el.com> Cc: linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org, linux-scsi@...r.kernel.org, linux-pm@...r.kernel.org, Alan Stern <stern@...land.harvard.edu>, Jeff Garzik <jgarzik@...ox.com>, "Rafael J. Wysocki" <rjw@...k.pl>, James Bottomley <JBottomley@...allels.com>, Huang Ying <ying.huang@...el.com>, Zhang Rui <rui.zhang@...el.com> Subject: Re: [PATCH 0/3] ata port runtime power management support Hello, On Wed, Nov 02, 2011 at 02:21:37PM +0800, Lin Ming wrote: > These 3 patches add ata port runtime pm support, which is done through scsi layer. > scsi host runtime pm mechanism is already there(scsi_pm.c). > These patches add hooks for ata port. > > Lin Ming (3): > scsi: fix potential dead lock for host runtime pm > scsi: add hooks for host runtime power management > ata: implement ata port runtime pm hooks Hmmm.... Some questions. * How much does this add on top of hardware timed auto spindown and dynamic link power management? * Do the added benefits justify yet another runtime powersaving mechanism? * Any way we can tie the other stuff with overall runtime PM? Thanks. -- tejun -- 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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