[LAU] Fwd: kernel needed

Marcos Guglielmetti marcospcmusica at gmail.com
Fri Mar 14 07:16:32 EDT 2008 

El Viernes, 14 de Marzo de 2008 10:05, Jorge Salgueiro escribió:
 | ---------- Forwarded message ----------
 | From: schoappied <schoappied at gmail.com>
 | Date: 13/03/2008 19:42
 | Subject: Re: [LAU] kernel needed
 | To: Josh Lawrence <hardbop200 at gmail.com>
 | Cc: A list for linux audio users
 | <linux-audio-user at lists.linuxaudio.org>
 |
 | Josh Lawrence wrote:
 | > All,
 | >
 | > I'm trying the list one more time in the hopes that someone
 | > might have missed this the first time...
 | >
 | > I've been attempting to compile a .deb kernel that has these
 | > attributes (patches/modules):
 | >
 | > * rt-preempt
 | > * squashfs
 | > * aufs

As far as i knew, it was not possible to any kernel hacker to build a 
kernel using these 3 softwares.

 | > ...and have failed miserably, many many times.  I'm hoping that
 | > some of the liveCD devs on this list might have one already done
 | > that they could share with me.  If you do, please let me know.
 | >
 | > Again, *very* sorry for posting this a second time, I'm just
 |
 | desperate.  :)
 
Why are you so desperated?

 |
 |
 |
 | Make one yourself with a little help...
 | http://forums.debian.net/viewtopic.php?t=17035&sid=1b174c3e2fd0bae
 |9ded46cc88a076d85
 |
 | Use the musix repo, and install with apt-get or the synaptic:
 |
 | # Repositorios de Musix GNU+Linux /etc/apt/sources.list
 | deb ftp://musix.ourproject.org/pub/musix/deb/ ./
 | # Musix-testing
 | # deb ftp://musix.ourproject.org/pub/musix/deb-testing/ ./
 
They did not use squashfs (for now!), these kernels use cloop

 | And for unstable/ sidux:
 |
 | http://sidux.com/index.php?module=pnWikka&tag=Audiostudio
 
Interesting, I will check it out!


traslated from german

Texto traducido de forma automática:
sidux als Audio Workstation 1.) Der rt-Kernel Um sidux als 
Realtime-Audio-Studio zu verwenden, ist ein Kernel mit 
Realtime-Preemtion, ein rt-Kernel, erforderlich. Daran arbeitet Ingo 
Molnar mit seinem rt-Patch. viele der Funktionen aus diesem Patch 
sind inzwischen Teil des offiziellen Linux-Kernels. Doch leider ist 
noch nicht alles integriert, so dass auch weiterhin ein Patch 
erforderlich ist. Für Interessierte: 
http://kernel.org/pub/linux/kernel/projects/rt/∞ Einen fertigen 
rt-Kernel für sidux gibt es auf: 
http://maledivenhilfe.com/makke/kernel/∞ Dort sind die jeweilig 
aktuellen slh-Kernel + rt-Patch, gepatcht und gepackt von makke 
(Danke makke). 2.) Die Konfiguration Um die Realtime-Preemtion als 
User zu nutzen, muss die Datei /etc/security/limits.conf (als root) 
editiert werden: @audio - rtprio 90 @audio - nice -5 @audio - memlock 
750000 Dieser Eintrag gibt den Mitgliedern der Gruppe "audio" das 
Recht Anwendungen mit rt-Priorität zu starten (die höchste ist 99 und 
sollte irq's (Timer,Soundkarte...) vorbehalten bleiben). Der 
nice-level wird um 5 erhöht (bzw. erniedrigt, also nicer) und 750MB 
Speicher können von der Anwendung "geblockt" werden (d.h. er steht 
exklusiv für die Anwendung zur Verfügung). Diesen Wert solltest du 
deiner Hardware anpassen! Der aktuell eingestellte memlock-Wert kann 
mit dem Befehl ulimit -l auslesen werden. Außerdem musst du natürlich 
Mitglied in der Gruppe "audio" sein, was du per default bei sidux 
bist. Das kannst du mit dem Befehl id überprüfen. Es ist auch möglich 
hier statt der Grupe audio direkt einem User die rt-rechte 
einzuräumen, wenn du statt audio den usernamen einträgst. PAM muß neu 
gestartet werden damit die Einstellungen wirksam werden. do you want 
more ?	 	
Sidux as audio workstation

1) The rt-kernel

To sidux as real-time audio studio, is a kernel with real-time 
Preemtion, a rt-kernel. That works Ingo Molnar with his rt-patch. 
Many of the features in this patch are now part of the official Linux 
kernel. But unfortunately, not all integrated, so that remains a 
patch is necessary.

For those interested:
Http://kernel.org/pub/linux/kernel/projects/rt/ ∞

A final rt-kernel for sidux are:
Http://maledivenhilfe.com/makke/kernel/ ∞

There are the respective current slh kernel + rt-patch, patch and 
gripped by makke (Thanks makke).


2) The configuration

To view the real-time Preemtion as user to use, the file / etc / 
security / limits.conf (as root) edited:

@ Audio - rtprio 90
@ Audio - nice -5
@ Audio - memlock 750000



This article gives the members of the group "audio" applications with 
the right rt priority to start (the highest is 99 and should irq's 
(timer, sound card ...) reserved). The nice-level will increase by 5 
(or humiliated, so nicer), and 750MB memory from the application 
can "block" (ie he is exclusively for the application available). 
This value should you adapt your hardware! The current set memlock 
value can be created with the command ulimit-l read.
In addition, you must of course a member of the group "audio", which 
by default when you sidux are. What you can use the command id. It is 
also possible here instead of the Grupe audio directly to a user 
rt-right should, if you place the user audio appearance. PAM has to 
be restarted for the settings to take effect.

................


http://maledivenhilfe.com/makke/kernel/experimental/linux-sidux-2.6_2.6.24-17rt_i386.changes

   * Added -rt3-patch
   * Removed unionfs (still no support)
   * -rt3 already includes:
     - 2.6.24.3_NET_add-if_addrlabel.h-to-sanitized-headers.diff
     - 
2.6.24.3_x86-move-out-tick_nohz_stop_sched_tick-call-from-the-loop.patch


As far as I know, this kernel will not work into a Live CD because it 
does not uses unionfs, but maybe it uses aufs.


 | Hope it will help you..
 |
 | Dirk
 |
 |
 |
 |
 | _______________________________________________
 | Linux-audio-user mailing list
 | Linux-audio-user at lists.linuxaudio.org
 | http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user

-- 
     `&' 
      #    Marcos Guglielmetti, co-director de               
      #   Musix GNU+Linux, 100% Software Libre para artistas      
     _#_       http://www.musix.org.ar           
     (#)     
    / O \    + archivos: ftp://musix.ourproject.org/pub/musix
   ( === )   Ecología: http://autosus2.wordpress.com    
    `---'    Personal: http://marcospcmusica.wordpress.com

Bender: "En nombre de todo lo que es bueno y es lógico, damos las 
gracias por ésta energía química que vamos a absorber. Según el 
profeta jerimático: 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 
0, 0, 1, 1, 0, 1... ¡¡ 2 !! Amén."

http://es.wikiquote.org/wiki/Futurama

More information about the Linux-audio-user mailing list