15 Jun
2010
15 Jun
'10
8:52 p.m.
Hi everyone
I have a question about Ubuntu 10.04 Lucid Lynx and RT kernels. Well all
kernels actually but I'm most interested in the RT ones for music.
I've noticed when using my 2.6.31-10 RT kernel an error message appears on
booting : "mount : mounting none on /dev failed" then everything is quite
slow. This error doesn't occur when using a 2.6.32 generic kernel.
Apparently, it has something to do with a new filesystem and kernel versions
prior or older than 2.6.32.
Does anyone know about this ? I've been searching through the internet but
didn't any *good* explanation. Just bits.
Thanks !
jy
15 Jun
15 Jun
10:55 p.m.
On Tue, Jun 15, 2010 at 08:51:51PM +0200, Jean-Yves Poilleux wrote:
I've noticed when using my 2.6.31-10 RT kernel an
error message appears on
booting : "mount : mounting none on /dev failed" then everything is quite
slow. This error doesn't occur when using a 2.6.32 generic kernel.
Apparently, it has something to do with a new filesystem and kernel versions
prior or older than 2.6.32.
Probably because it lacks devtmpfs, which was merged on 2.6.32 if I
recall correctly. Try 2.6.33 RT kernel, it works OK for me.
16 Jun
16 Jun
9:19 a.m.
ok
i'll do that. So it is linked to devtmpfs....
thanks
jy
2010/6/15 Roberto <roberto(a)zenvoid.org>
On Tue, Jun 15, 2010 at 08:51:51PM +0200, Jean-Yves
Poilleux wrote:
I've noticed when using my 2.6.31-10 RT
kernel an error message appears
on
booting : "mount : mounting none on /dev
failed" then everything is quite
slow. This error doesn't occur when using a 2.6.32 generic kernel.
Apparently, it has something to do with a new filesystem and kernel
versions
prior or older than 2.6.32.
Probably because it lacks devtmpfs, which was merged on 2.6.32 if I
recall correctly. Try 2.6.33 RT kernel, it works OK for me.
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Linux-audio-user(a)lists.linuxaudio.org
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10:25 a.m.
On Tue, Jun 15, 2010 at 10:55 PM, Roberto <roberto(a)zenvoid.org> wrote:
On Tue, Jun 15, 2010 at 08:51:51PM +0200, Jean-Yves
Poilleux wrote:
Is there an RT *.33 kernel for Ubuntu 10.04?
\r
I've noticed when using my 2.6.31-10 RT
kernel an error message appears
on
booting : "mount : mounting none on /dev
failed" then everything is quite
slow. This error doesn't occur when using a 2.6.32 generic kernel.
Apparently, it has something to do with a new filesystem and kernel
versions
prior or older than 2.6.32.
Probably because it lacks devtmpfs, which was merged on 2.6.32 if I
recall correctly. Try 2.6.33 RT kernel, it works OK for me.
10:45 a.m.
On 2010-06-16 10:25, rosea grammostola wrote:
Is there an RT *.33 kernel for Ubuntu 10.04?
Yes!
https://launchpad.net/~abogani/+archive/ppa
It seems to work fine here...
--
Atte
http://atte.dk http://modlys.dk
10:48 a.m.
On 2010-06-16 10:45, Atte André Jensen wrote:
sudo add-apt-repository ppa:abogani/ppa
sudo apt-get update
sudo apt-get install linux-image-2.6.33-1-realtime
--
Atte
http://atte.dk http://modlys.dk
18 Jun
18 Jun
4:13 p.m.
El 06/16/2010 10:48 AM, Atte André Jensen escribió:
On 2010-06-16 10:45, Atte André Jensen wrote:
sudo add-apt-repository ppa:abogani/ppa
sudo apt-get update
sudo apt-get install linux-image-2.6.33-1-realtime
??
The latest kernel that I found there is linux-lowlatency_2.6.32.22.35
(the used URL is
http://ppa.launchpad.net/abogani/ppa/ubuntu/dists/lucid/main/)
Natanael.
10:03 p.m.
On 2010-06-18 16:13, Natanael Olaiz wrote:
The latest kernel that I found there is
linux-lowlatency_2.6.32.22.35
(the used URL is
http://ppa.launchpad.net/abogani/ppa/ubuntu/dists/lucid/main/)
Are you sure. Those commands were copy/pasted from my bash history, and:
atte@vestbjerg:~$ uname -r
2.6.33-1-realtime
Might have messed things up, though. Have you tried running the three
commands I mentioned?
--
Atte
http://atte.dk http://modlys.dk
10:08 p.m.
On 06/18/2010 04:13 PM, Natanael Olaiz wrote:
El 06/16/2010 10:48 AM, Atte André Jensen escribió:
Low-latency is not realtime preemption.
Since the mid 20's the RT-patch is only available for odd minor version
numbers. eg. 2.6.29, 2.6.31, 2.6.33
see http://www.kernel.org/pub/linux/kernel/projects/rt/
Well, maybe someone forward patched or backported rt-stuff onto 2.6.32
but I would not trust those.. it's way too easy to mess it up.
ciao,
robin
On 2010-06-16 10:45, Atte André Jensen wrote:
sudo add-apt-repository ppa:abogani/ppa
sudo apt-get update
sudo apt-get install linux-image-2.6.33-1-realtime
??
The latest kernel that I found there is linux-lowlatency_2.6.32.22.35
(the used URL is
http://ppa.launchpad.net/abogani/ppa/ubuntu/dists/lucid/main/)
10:21 p.m.
On 06/18/2010 10:08 PM, Robin Gareus wrote:
On 06/18/2010 04:13 PM, Natanael Olaiz wrote:
Sorry this was a bit quick and the statement may be misleading:
There's a (old) "low-latency" kernel-patch and also various options to
achieve low-latency with a vanilla kernel.
Those may be good enough for some audio/studio environments, but is not
the same as applying the realtime-preemt patch to the kernel.
The kernel-package-name is made up by your vendor.
It may or may not be a realtime-preemt patched kernel;
`uname -a` will say "PREEMPT" if it is.
El 06/16/2010 10:48 AM, Atte André Jensen
escribió:
Low-latency is not realtime preemption. On 2010-06-16 10:45, Atte André Jensen wrote:
sudo add-apt-repository ppa:abogani/ppa
sudo apt-get update
sudo apt-get install linux-image-2.6.33-1-realtime
??
The latest kernel that I found there is linux-lowlatency_2.6.32.22.35
(the used URL is
http://ppa.launchpad.net/abogani/ppa/ubuntu/dists/lucid/main/) Since the mid 20's the RT-patch is only available
for odd minor version
numbers. eg. 2.6.29, 2.6.31, 2.6.33
see http://www.kernel.org/pub/linux/kernel/projects/rt/
Well, maybe someone forward patched or backported rt-stuff onto 2.6.32
but I would not trust those.. it's way too easy to mess it up.
ciao,
robin
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days inactive
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days old
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9 comments
6 participants
participants (6)
-
Atte André Jensen -
Jean-Yves Poilleux -
Natanael Olaiz -
Roberto -
Robin Gareus -
rosea grammostola