From: Pavel Machek <pavel@suse.cz>
To: Jens Axboe <axboe@suse.de>
Cc: Alejandro Bonilla Beeche <abonilla@linuxwireless.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
hdaps devel <hdaps-devel@lists.sourceforge.net>
Subject: Re: HDAPS, Need to park the head for real
Date: Thu, 18 Aug 2005 22:49:04 +0200 [thread overview]
Message-ID: <20050818204904.GE516@openzaurus.ucw.cz> (raw)
In-Reply-To: <20050816200708.GE3425@suse.de>
Hi!
> I would suggest some sysfs file for doing this. The best approach would
Actually it is usefull for other devices, too... for power saving.
Some people call it "runtime power managment".
> sysfs attribute for this and we integrate a proper solution once the
> request type stuff is finalized. As the user api, I would suggest just
> echoing a timeout in seconds to the file. So:
>
> # echo 5 > /sys/block/hda/device/freeze
>
> would park the head, freeze queue, and unfreeze in 5 seconds.
Please make it "echo 1 > frozen", then userspace can do "echo 0 > frozen"
after five seconds.
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next prev parent reply other threads:[~2005-08-18 20:50 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-16 15:25 HDAPS, Need to park the head for real Alejandro Bonilla Beeche
2005-08-16 15:34 ` Lee Revell
2005-08-16 15:41 ` Alejandro Bonilla Beeche
2005-08-16 20:07 ` Jens Axboe
2005-08-16 23:15 ` Alejandro Bonilla Beeche
2005-08-16 23:29 ` [Hdaps-devel] " Yani Ioannou
2005-08-17 5:53 ` Jens Axboe
2005-08-17 6:23 ` [Hdaps-devel] " Jon Escombe
2005-08-17 7:47 ` Avi Kivity
2005-08-17 7:56 ` Jens Axboe
2005-08-18 20:49 ` Pavel Machek [this message]
2005-08-18 21:15 ` Adam Goode
2005-08-18 21:30 ` [Hdaps-devel] " Dave Hansen
2005-08-18 21:38 ` Pavel Machek
2005-08-19 6:36 ` Jens Axboe
2005-08-19 10:05 ` [Hdaps-devel] " Jon Escombe
2005-08-19 10:23 ` Jens Axboe
2005-08-19 12:41 ` Alejandro Bonilla
2005-08-24 21:44 ` Jon Escombe
2005-08-25 10:57 ` Alan Cox
2005-08-25 18:14 ` Jon Escombe
2005-08-26 6:49 ` Jens Axboe
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