25 Mar
2009
25 Mar
'09
5:47 p.m.
Hi,
Sorry, but I've to call again...
The developers seems very willing to include a realtime kernel there
repo. They need some people who wants to build and maintain it. This is
really a chance for linux audio, especially on Debian. *This is the
moment!*
So please consider to offer your help in building, maintaining and/or
testing!
Thanks in advance,
\r
Grammostola Rosea wrote:
Grammostola Rosea wrote:
Hi,
There is an promising discussion on the debian-dev mailinglist. Maybe
some people who knows more about realtime kernels could join. Also
users who might want to have an realtime kernel in Debian and/or want
help testing could join the discussion. I think it would be nice if
there is also an realtime kernel in Debian or that the default kernel
would be improved for realtime (audio) usage.
http://www.debian.org/MailingLists/subscribe
Here is the thread about a realtime
kernel in Debian:
http://www.linux-archive.org/debian-development/268999-realtime-kernel-debi…
Kind regards,
\r
\r
------------------------------------------------------------------------
Subject:
Re: realtime kernel for Debian
From:
"Giacomo A. Catenazzi" <cate(a)debian.org>
Date:
Tue, 24 Mar 2009 13:26:35 +0100
To:
debian-devel(a)lists.debian.org
To:
debian-devel(a)lists.debian.org
Raphael Hertzog wrote:
On Tue, 24 Mar 2009, Giacomo A. Catenazzi wrote:
Yes, I didn't write very well my sentence: the previous quotes was more
about "there exist rt kernels", "ubuntu has a rt kernel", but not
solid
requirements. I had to write some "seems", and I'm sorry for the two
quoted people if it seems an attack.
Anyway, later in the mail, I asked for precise needs, so we could see
better what we should improve.
IMHO most users want a low latency kernel, but not a slower kernel, so
a CONFIG_HZ_1000 would be nice. But the original post was about
multimedia production (and not reproduction), so the needs are probably
other.
My point was more:
- Debian has not rt kernel. Why? Non DD interested or/and low demand?
This is an important point. We must not produce a rt-kernel if
we cannot provide testers and developers (in unstable).
- kernel management is a weak point in distribution: no good method
for kernel dependencies, using full capabilities, ...
so IMHO we should try harder with the normal kernel, so that we
can use the same infrastructure and testers. If we fail and we
are able to support rt kernels, IMO it is good to provide it in Debian.
The original mail was about "multimedia production" and few year ago
kernel
developers had a lot of interaction with music industries.
I'm not an expert in the field, but how far are we in their need with
standard kernels?)
Do you really need real time kernel?
Debian is a technical driven project, but reading the previous two
quotes,
"real time" is used as marketing thing.
It's good to question the use of any feature, but a real-time kernel is
certainly very useful in many industrial applications and Debian is
popular in that field. (Don't put a marketing label on anything where
you are not yourself sure of your expertise.) I do use a real-time kernel on a Debian based
system for one of my
customers (but I have to recompile the kernel anyway because I do other
customizations) and I have good reasons to do so because I can't suffer
serial overrun and I must ensure that the serial interrupt handler
is run in the required time and that no other (kernel) task has higher
priority.
These *other customizations* are important to rt-kernel. So we need
a person (or more) that know the needs and could support us.
"realtime" alone is only a label ;-)
ciao
cate