From: Oliver Neukum <oneukum@suse.de>
To: Pavel Machek <pavel@suse.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>,
linux-pm@lists.linux-foundation.org,
James.Bottomley@hansenpartnership.com,
linux-kernel@vger.kernel.org, teheo@novell.com,
stefanr@s5r6.in-berlin.de, Martin.Leisner@xerox.com
Subject: Re: autosuspend for SCSI devices
Date: Mon, 25 Aug 2008 10:55:44 +0200 [thread overview]
Message-ID: <200808251055.45582.oneukum@suse.de> (raw)
In-Reply-To: <20080825081901.GA32128@elf.ucw.cz>
Am Montag 25 August 2008 10:19:01 schrieb Pavel Machek:
> From: Alan Stern <stern@rowland.harvard.edu>
>
> Add support for autosuspend/autoresume of the SCSI devices. Lowlevel
> driver can use it to spin the disk down... and it is neccessary step
> for powering down the controllers.
>
> Spinning down the disk is useful - saves ~0.5W here, and it is last
> major thing we can do to save power on some small machines like
> Kohjinsha subnotebooks.
>
> Signed-off-by: Pavel Machek <pavel@suse.cz>
Hi,
firstly, it doesn't consider error handling before suspending.
Secondly, it is simply not true that in SCSI suspending the disks
is always necessary before suspending the controller.
Regards
Oliver
next prev parent reply other threads:[~2008-08-25 8:54 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-22 10:56 autosuspend for SCSI devices Pavel Machek
2008-08-22 20:52 ` Rafael J. Wysocki
2008-08-25 8:19 ` Pavel Machek
2008-08-25 8:55 ` Oliver Neukum [this message]
2008-08-26 9:43 ` Pavel Machek
2008-08-26 11:01 ` Oliver Neukum
2008-08-28 8:04 ` Pavel Machek
2008-08-28 21:17 ` Oliver Neukum
2008-09-02 9:08 ` Pavel Machek
2008-09-02 9:39 ` Oliver Neukum
2008-09-02 14:04 ` [linux-pm] " Alan Stern
2008-08-25 19:47 ` Tino Keitel
2008-08-26 9:44 ` Pavel Machek
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