From: Phillip Susi <psusi@ubuntu.com>
To: Aaron Lu <aaron.lu@intel.com>, linux-scsi@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
"linux-ide@vger.kernel.org" <linux-ide@vger.kernel.org>,
Tejun Heo <tj@kernel.org>, Robert Hancock <hancockr@shaw.ca>
Subject: Re: [PATCH 1/2] libata: use sleep instead of standby command
Date: Mon, 04 Nov 2013 21:39:10 -0500 [thread overview]
Message-ID: <52785A4E.7080006@ubuntu.com> (raw)
In-Reply-To: <527856B6.8030901@intel.com>
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On 11/04/2013 09:23 PM, Aaron Lu wrote:
> I suppose this is mainly for runtime PM? Since for system
> suspend/hibernation, the disk and its controller will be powered
> off anyway.
Yes, or the second patch also helps when one manually issues hdparm
- -Y, which otherwise will cause the drive to be woken up to answer the
CHECK POWER command, which udisks issues to decide if it should skip
polling the SMART status of the drive.
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next prev parent reply other threads:[~2013-11-05 2:39 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-05 0:52 [PATCH 1/2] libata: use sleep instead of standby command Phillip Susi
2013-11-05 0:53 ` [PATCH 2/2] libata: avoid waking disk to check power Phillip Susi
2013-11-05 2:39 ` Aaron Lu
2013-11-05 2:45 ` Phillip Susi
2013-11-05 2:23 ` [PATCH 1/2] libata: use sleep instead of standby command Aaron Lu
2013-11-05 2:39 ` Phillip Susi [this message]
2013-11-05 2:44 ` Aaron Lu
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