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From: Tejun Heo <tj@kernel.org>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Jeff Garzik <jgarzik@pobox.com>,
	linux-ide@vger.kernel.org, akpm@linux-foundation.org
Subject: Re: [PATCH] libata: Add ALPM power state accounting to the AHCI driver
Date: Mon, 16 Nov 2009 10:51:48 +0900	[thread overview]
Message-ID: <4B00B034.5010908@kernel.org> (raw)
In-Reply-To: <20091115103313.4691924d@infradead.org>

11/16/2009 03:33 AM, Arjan van de Ven wrote:
>> Enabling DIPM means that the drive will be in charge of transitioning
>> the link into powersave modes, so if sampling SStatus is necessary to
>> determine how much time the link spends in powersave mode.
> 
> do we get a link interrupt when the state changes?
> (with ALPM we do.. optionally.. which is where the flag comes in)

It will depend on the controller I suppose but we can always poll.

Thanks.

-- 
tejun

  reply	other threads:[~2009-11-16  1:50 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-11-14  3:24 [PATCH] libata: Add ALPM power state accounting to the AHCI driver Arjan van de Ven
2009-11-15  8:05 ` Tejun Heo
2009-11-15  8:27   ` Jeff Garzik
2009-11-15 17:46     ` Arjan van de Ven
2009-11-15 18:06       ` Tejun Heo
2009-11-15 18:23         ` Arjan van de Ven
2009-11-15 18:26           ` Tejun Heo
2009-11-15 18:33             ` Arjan van de Ven
2009-11-16  1:51               ` Tejun Heo [this message]
2009-11-16  2:00                 ` Arjan van de Ven
2009-11-16  2:15                   ` Tejun Heo
2009-11-16  5:55                     ` Arjan van de Ven
2009-11-16  6:14                       ` Tejun Heo
2009-11-16  8:13                         ` Jeff Garzik
2009-11-16 14:43                           ` Arjan van de Ven
2009-11-16 14:59                             ` Tejun Heo
2009-11-16 15:21                               ` Arjan van de Ven
2009-11-16 15:35                                 ` Tejun Heo
2009-11-16 15:40                                   ` Tejun Heo
2009-11-16 15:57                                   ` Alan Cox
2009-11-16 16:25                                     ` Tejun Heo
2009-11-16 21:25                                 ` Jeff Garzik
2009-11-16 21:21                             ` Jeff Garzik
2009-11-17  5:25                               ` Arjan van de Ven
2009-11-15 17:00   ` Arjan van de Ven
2009-11-15 18:36   ` Arjan van de Ven
2009-11-15 18:42     ` Arjan van de Ven

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