From: Jens Axboe <axboe@suse.de>
To: Pavel Machek <pavel@suse.cz>
Cc: Adam Goode <adam@evdebs.org>,
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: Fri, 19 Aug 2005 08:36:06 +0200 [thread overview]
Message-ID: <20050819063602.GD6273@suse.de> (raw)
In-Reply-To: <20050818213823.GA4275@elf.ucw.cz>
On Thu, Aug 18 2005, Pavel Machek wrote:
> Hi!
>
> > > Please make it "echo 1 > frozen", then userspace can do "echo 0 > frozen"
> > > after five seconds.
> >
> > What if the code to do "echo 0 > frozen" is swapped out to disk? ;)
>
> Emergency head parker needs to be pagelocked for other reasons. You do
> not want to page it from disk while your notebook is in free fall.
It's still a very bad idea imho, what if the head parker daemon is
killed for other reasons? The automatic timeout thawing the drive is
much saner.
--
Jens Axboe
next prev parent reply other threads:[~2005-08-19 6:33 UTC|newest]
Thread overview: 24+ 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
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 [this message]
2005-08-19 10:05 ` [Hdaps-devel] " Jon Escombe
2005-08-19 10:23 ` Jens Axboe
2005-08-19 12:41 ` Alejandro Bonilla
[not found] ` <20050816200708.GE3425-l3A5Bk7waGM@public.gmane.org>
2005-08-24 21:44 ` Jon Escombe
2005-08-24 21:44 ` [Hdaps-devel] " Jon Escombe
2005-08-25 10:57 ` Alan Cox
2005-08-25 18:14 ` Jon Escombe
[not found] ` <430E0A84.8080809-Xbpc2PeERmvQXOPxS62xeg@public.gmane.org>
2005-08-26 6:49 ` Jens Axboe
2005-08-26 6:49 ` [Hdaps-devel] " Jens Axboe
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