Date: Tue, 26 Mar 2002 19:52:45 +0100
From: Ragnar Hojland Espinosa <ragnar@jazzfree.com>
To: Frank Cornelis <fcorneli@elis.rug.ac.be>
Cc: linux-kernel@vger.kernel.org, Frank.Cornelis@elis.rug.ac.be
Subject: Re: realtime processes and CD-ROM
Message-ID: <20020326195245.B2539@ragnar-hojland.com>
In-Reply-To: <Pine.LNX.4.44.0203251716140.24395-100000@trappist.elis.rug.ac.be>
Mime-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
User-Agent: Mutt/1.2.5i
Organization: Mediocrity Naysayers Ltd
Sender: linux-kernel-owner@vger.kernel.org

On Mon, Mar 25, 2002 at 05:25:50PM +0100, Frank Cornelis wrote:
> The MP3 player XMMS has the option of making it a realtime process.
> But even after doing so, the music sometimes blocks. This is when my CDROM 
> is being accessed when it is not spinning anymore (spin-up time).
> Would it be very hard to reprogram the linux kernel in such a way that
> certain devices can't be turned off when realtime processes access these
> devices? These devices would include CDROM players, harddisks.
> Please note that I'm not looking for a way to (globally) disable the 
> spinning off of my CDROM player when it's in use. Only when realtime 
> processes access these devices the spinning of should be disabled.
> If anyone is programming on something like described above please let me 
> know.

XMMS could have a flag to set spinning with CDROMSETSPINDOWN, which should
do what you are looking for.

____/|  Ragnar H?jland      Freedom - Linux - OpenGL |    Brainbench MVP
\ o.O|  PGP94C4B2F0D27DE025BE2302C104B78C56 B72F0822 | for Unix Programming
 =(_)=  "Thou shalt not follow the NULL pointer for  | (www.brainbench.com)
   U     chaos and madness await thee at its end."      [15 pend. Mar 10]
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/