linux-kernel - Re: [PATCH 2/2] libata: avoid waking disk to check power

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Message-ID: <52785BC5.9020205@ubuntu.com>
Date:	Mon, 04 Nov 2013 21:45:25 -0500
From:	Phillip Susi <psusi@...ntu.com>
To:	Aaron Lu <aaron.lu@...el.com>, linux-scsi@...r.kernel.org
CC:	linux-kernel@...r.kernel.org,
	"linux-ide@...r.kernel.org" <linux-ide@...r.kernel.org>,
	Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH 2/2] libata: avoid waking disk to check power

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On 11/04/2013 09:39 PM, Aaron Lu wrote:
> If the disk entered sleep mode due to runtime PM, then udisks can
> easily tell by checking the device's runtime status and not send
> out the query.
> 
> But if the disk entered sleep mode due to other reason, the patch
> may be necessary. So what's your scenario?

I am planning on patching udisks to do that as well, but if you have a
current udsisk or manually run hdparm -C, or some other program is
doing something similar, then this patch takes care of that.



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