debian RT kernel

debian RT kernel

[Jaromír Mikeš]

Hi all,

We quite recently had RT in debian easily accessible for all users
what I personally consider to be great achievement.
But because RT development interruption we don't have fresh RT kernels anymore.

Pengutronix provided debian packages of RT kernels before.
Is there any place where to get debian packages of RT kernels?

best regards

mira

Re: debian RT kernel

[Steven Rostedt]

On Mon, 18 May 2015 22:13:40 +0200
Jaromír Mikeš <mira.mikes@gmail.com> wrote:

> Hi all,
> 
> We quite recently had RT in debian easily accessible for all users
> what I personally consider to be great achievement.
> But because RT development interruption we don't have fresh RT kernels anymore.
> 
> Pengutronix provided debian packages of RT kernels before.
> Is there any place where to get debian packages of RT kernels?
> 

I believe Ben is the one that maintains the RT kernels in Debian.

-- Steve
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Re: debian RT kernel

[Ben Hutchings]

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On Tue, 2015-05-19 at 11:56 -0400, Steven Rostedt wrote:
> On Mon, 18 May 2015 22:13:40 +0200
> Jaromír Mikeš <mira.mikes@gmail.com> wrote:
> 
> > Hi all,
> > 
> > We quite recently had RT in debian easily accessible for all users
> > what I personally consider to be great achievement.
> > But because RT development interruption we don't have fresh RT kernels anymore.
> > 
> > Pengutronix provided debian packages of RT kernels before.
> > Is there any place where to get debian packages of RT kernels?
> > 
> 
> I believe Ben is the one that maintains the RT kernels in Debian.

I built kernel packages with the RT patch set whenever it was available
for the upstream version we were using for standard kernel packages.
Unfortunately there is no patch set for Linux 3.16 as used in Debian 8
'jessie' or for Linux 4.0 which is currently in unstable.

Older versions are available from
<http://snapshot.debian.org/package/linux/> but they will have known
security issues.

Ben.

-- 
Ben Hutchings
I'm not a reverse psychological virus.  Please don't copy me into your sig.

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Re: debian RT kernel

[Jaromír Mikeš]

2015-05-19 18:58 GMT+02:00 Ben Hutchings <ben@decadent.org.uk>:
> On Tue, 2015-05-19 at 11:56 -0400, Steven Rostedt wrote:
>> On Mon, 18 May 2015 22:13:40 +0200
>> Jaromír Mikeš <mira.mikes@gmail.com> wrote:
>>
>> > Hi all,
>> >
>> > We quite recently had RT in debian easily accessible for all users
>> > what I personally consider to be great achievement.
>> > But because RT development interruption we don't have fresh RT kernels anymore.
>> >
>> > Pengutronix provided debian packages of RT kernels before.
>> > Is there any place where to get debian packages of RT kernels?
>> >
>>
>> I believe Ben is the one that maintains the RT kernels in Debian.

I know that Ben is doing great work in maintaining debian kernels.

> I built kernel packages with the RT patch set whenever it was available
> for the upstream version we were using for standard kernel packages.

> Unfortunately there is no patch set for Linux 3.16 as used in Debian 8
> 'jessie' or for Linux 4.0 which is currently in unstable.

I also know that there are not currently patches against 4.0 kernel
which is in debian "sid"
Would be great if Ben's work and work of rt-kernel developers could be
synced again as it was before 3.16

Do you (rt devs) plan make patches again for latest kernels as you
have done before?

> Older versions are available from
> <http://snapshot.debian.org/package/linux/> but they will have known
> security issues.

I am still using linux-image-3.14-2-amd64 which is already bit
outdated ... I am having some issues to boot it on my debian "testing"
machine.

best regards

mira
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Re: debian RT kernel

[Steven Rostedt]

On Tue, 19 May 2015 20:45:58 +0200
Jaromír Mikeš <mira.mikes@gmail.com> wrote:

> Do you (rt devs) plan make patches again for latest kernels as you
> have done before?

Ideally, we will get RT into mainline. There's still a lot of work to
do, and that's somewhat where the focus is.

-- Steve
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Re: debian RT kernel

[Jaromír Mikeš]

2015-05-19 21:06 GMT+02:00 Steven Rostedt <rostedt@goodmis.org>:
> On Tue, 19 May 2015 20:45:58 +0200
> Jaromír Mikeš <mira.mikes@gmail.com> wrote:
>
>> Do you (rt devs) plan make patches again for latest kernels as you
>> have done before?
>
> Ideally, we will get RT into mainline. There's still a lot of work to
> do, and that's somewhat where the focus is.

Yes, but as I understand this process could last for years and some RT
patches will be always maintained out of mainline.
Or something changed?
What should do user which need RT kernel now?

Sorry I am just afraid that I will have to compile rt-kernel myself as
I did it years ago.
It is time consuming and there are better people (like Ben) which
hopefully could do it me and others.

mira
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Re: debian RT kernel

[Jaromír Mikeš]

2015-05-20 0:03 GMT+02:00 Jaromír Mikeš <mira.mikes@gmail.com>:
> 2015-05-19 21:06 GMT+02:00 Steven Rostedt <rostedt@goodmis.org>:
>> On Tue, 19 May 2015 20:45:58 +0200
>> Jaromír Mikeš <mira.mikes@gmail.com> wrote:
>>
>>> Do you (rt devs) plan make patches again for latest kernels as you
>>> have done before?
>>
>> Ideally, we will get RT into mainline. There's still a lot of work to
>> do, and that's somewhat where the focus is.
>
> Yes, but as I understand this process could last for years and some RT
> patches will be always maintained out of mainline.
> Or something changed?
> What should do user which need RT kernel now?
>
> Sorry I am just afraid that I will have to compile rt-kernel myself as
> I did it years ago.
> It is time consuming and there are better people (like Ben) which
> hopefully could do it me and others.


Opps 4.0.4-rt1 released during writing previous email ;)

mira
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Re: debian RT kernel

[Steven Rostedt]

On Wed, 20 May 2015 00:03:32 +0200
Jaromír Mikeš <mira.mikes@gmail.com> wrote:

> 2015-05-19 21:06 GMT+02:00 Steven Rostedt <rostedt@goodmis.org>:
> > On Tue, 19 May 2015 20:45:58 +0200
> > Jaromír Mikeš <mira.mikes@gmail.com> wrote:
> >
> >> Do you (rt devs) plan make patches again for latest kernels as you
> >> have done before?
> >
> > Ideally, we will get RT into mainline. There's still a lot of work to
> > do, and that's somewhat where the focus is.
> 
> Yes, but as I understand this process could last for years and some RT
> patches will be always maintained out of mainline.
> Or something changed?
> What should do user which need RT kernel now?

Well, 4.0-rt has just been released :-)

-- Steve
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Re: debian RT kernel

[Ben Hutchings]

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On Tue, 2015-05-19 at 18:10 -0400, Steven Rostedt wrote:
> On Wed, 20 May 2015 00:03:32 +0200
> Jaromír Mikeš <mira.mikes@gmail.com> wrote:
> 
> > 2015-05-19 21:06 GMT+02:00 Steven Rostedt <rostedt@goodmis.org>:
> > > On Tue, 19 May 2015 20:45:58 +0200
> > > Jaromír Mikeš <mira.mikes@gmail.com> wrote:
> > >
> > >> Do you (rt devs) plan make patches again for latest kernels as you
> > >> have done before?
> > >
> > > Ideally, we will get RT into mainline. There's still a lot of work to
> > > do, and that's somewhat where the focus is.
> > 
> > Yes, but as I understand this process could last for years and some RT
> > patches will be always maintained out of mainline.
> > Or something changed?
> > What should do user which need RT kernel now?
> 
> Well, 4.0-rt has just been released :-)

...and now imported into the Debian packaging repo.

Ben.

-- 
Ben Hutchings
I'm not a reverse psychological virus.  Please don't copy me into your sig.

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Re: debian RT kernel

[Jaromír Mikeš]

2015-05-20 2:25 GMT+02:00 Ben Hutchings <ben@decadent.org.uk>:
> On Tue, 2015-05-19 at 18:10 -0400, Steven Rostedt wrote:
>> On Wed, 20 May 2015 00:03:32 +0200
>> Jaromír Mikeš <mira.mikes@gmail.com> wrote:
>>
>> > 2015-05-19 21:06 GMT+02:00 Steven Rostedt <rostedt@goodmis.org>:
>> > > On Tue, 19 May 2015 20:45:58 +0200
>> > > Jaromír Mikeš <mira.mikes@gmail.com> wrote:
>> > >
>> > >> Do you (rt devs) plan make patches again for latest kernels as you
>> > >> have done before?
>> > >
>> > > Ideally, we will get RT into mainline. There's still a lot of work to
>> > > do, and that's somewhat where the focus is.
>> >
>> > Yes, but as I understand this process could last for years and some RT
>> > patches will be always maintained out of mainline.
>> > Or something changed?
>> > What should do user which need RT kernel now?
>>
>> Well, 4.0-rt has just been released :-)
>
> ...and now imported into the Debian packaging repo.
>

... awesome ;)
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Re: debian RT kernel

[Braud Caroline]

Hello,

Sorry to ask but where is  the Debian packaging repo for 4.0-rt ?

Thanks in advance,
CB
 
 
> > > Yes, but as I understand this process could last for years and some RT
> > > patches will be always maintained out of mainline.
> > > Or something changed?
> > > What should do user which need RT kernel now?
> > 
> > Well, 4.0-rt has just been released :-)
> 
> ...and now imported into the Debian packaging repo.
> 
> Ben.
> 
> -- 
> Ben Hutchings
> I'm not a reverse psychological virus.  Please don't copy me into your sig.
 
 

Re: debian RT kernel

[Ben Hutchings]

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On Fri, 2015-05-22 at 17:52 +0200, Braud Caroline wrote:
> Hello,
> 
> Sorry to ask but where is  the Debian packaging repo for 4.0-rt ?

See the kernel handbook:
http://kernel-handbook.alioth.debian.org/ch-common-tasks.html#s-common-official-vcs

In this case you want the 'sid' distribution.

Ben.

-- 
Ben Hutchings
One of the nice things about standards is that there are so many of them.

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Re: debian RT kernel

[Braud Caroline]

Hello,

So if I understand well, the installation of RT package in a brand new PC:

- step 1: installation of a distribution (I have installed debian jessie)
- step 2: to be able to have access of RT packages in development:
follow the link you gave me (4.3 and 4.2 steps) by replacing "dist" by "sid"
- step 3: install RT packages in development using apt-get install (headers and image RT) ??

Thanks a lot, and sorry for my level in linux kernel ...  
The RT kernel is very usefull for me and I find the RT-PREEMPT development very interesting :)

CB

Le Vendredi 22 Mai 2015 23:22 CEST, Ben Hutchings <ben@decadent.org.uk> a écrit: 
 
> On Fri, 2015-05-22 at 17:52 +0200, Braud Caroline wrote:
> > Hello,
> > 
> > Sorry to ask but where is  the Debian packaging repo for 4.0-rt ?
> 
> See the kernel handbook:
> http://kernel-handbook.alioth.debian.org/ch-common-tasks.html#s-common-official-vcs
> 
> In this case you want the 'sid' distribution.
> 
> Ben.
> 
> -- 
> Ben Hutchings
> One of the nice things about standards is that there are so many of them.
 
 

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Re: debian RT kernel

[Ben Hutchings]

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On Tue, 2015-05-26 at 09:24 +0200, Braud Caroline wrote:
> Hello,
> 
> So if I understand well, the installation of RT package in a brand new PC:
> 
> - step 1: installation of a distribution (I have installed debian jessie)
> - step 2: to be able to have access of RT packages in development:
> follow the link you gave me (4.3 and 4.2 steps) by replacing "dist" by "sid"
> - step 3: install RT packages in development using apt-get install (headers and image RT) ??

You would use 'dpkg -i', rather than 'apt-get' to install a local file.

> Thanks a lot, and sorry for my level in linux kernel ...  
> The RT kernel is very usefull for me and I find the RT-PREEMPT development very interesting :)

I uploaded a new linux package (version 4.0.4-1) to unstable earlier
today with the PREEMPT_RT patchset included, so you could also just wait
a day for it to hit the mirrors.

Ben.

-- 
Ben Hutchings
Unix is many things to many people,
but it's never been everything to anybody.

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Re: debian RT kernel

[Jaromír Mikeš]

2015-05-27 1:11 GMT+02:00 Ben Hutchings <ben@decadent.org.uk>:

> I uploaded a new linux package (version 4.0.4-1) to unstable earlier
> today with the PREEMPT_RT patchset included, so you could also just wait
> a day for it to hit the mirrors.

Why we don't have linux-image-rt-amd64 but just linux-image-rt-686-pae?

best regards

mira

Re: debian RT kernel

[Ben Hutchings]

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On Sat, 2015-05-30 at 21:23 +0200, Jaromír Mikeš wrote:
> 2015-05-27 1:11 GMT+02:00 Ben Hutchings <ben@decadent.org.uk>:
> 
> > I uploaded a new linux package (version 4.0.4-1) to unstable earlier
> > today with the PREEMPT_RT patchset included, so you could also just wait
> > a day for it to hit the mirrors.
> 
> Why we don't have linux-image-rt-amd64 but just linux-image-rt-686-pae?

The build broke on amd64; it will be fixed in the next upload.

Ben.

-- 
Ben Hutchings
In a hierarchy, every employee tends to rise to his level of incompetence.

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Re: debian RT kernel

[Pavel Vasilyev]

30.05.2015 22:38, Ben Hutchings пишет:

>>> I uploaded a new linux package (version 4.0.4-1) to unstable earlier
>>> today with the PREEMPT_RT patchset included, so you could also just wait
>>> a day for it to hit the mirrors.
>>
>> Why we don't have linux-image-rt-amd64 but just linux-image-rt-686-pae?
>
> The build broke on amd64; it will be fixed in the next upload.

My config http://pastebin.com/GcbQf6gK

$ cat /proc/cmdline
root=/dev/sda2 ro quiet vga=0 noapg pci=routeirq nmi_watchdog=0 iommu=noagp 
clocksource=hpet workqueue.power_efficient=0 hpet=force processor.max_cstate=1


~$ uname -a
Linux amd64 4.0.4-rt1+ #1 SMP PREEMPT RT Thu May 28 19:20:20 MSK 2015 x86_64 
GNU/Linux

~$ cat /etc/debian_version
8.0

~$ grep 'model name' /proc/cpuinfo | uniq
model name      : AMD Opteron(tm) Processor 4386

Motherboard: Tyan s8225

-- 

                                                          Pavel.
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Re: debian RT kernel

[Jaromír Mikeš]

2015-05-30 21:38 GMT+02:00 Ben Hutchings <ben@decadent.org.uk>:
> On Sat, 2015-05-30 at 21:23 +0200, Jaromír Mikeš wrote:
>> 2015-05-27 1:11 GMT+02:00 Ben Hutchings <ben@decadent.org.uk>:

Hi Ben,

>> > I uploaded a new linux package (version 4.0.4-1) to unstable earlier
>> > today with the PREEMPT_RT patchset included, so you could also just wait
>> > a day for it to hit the mirrors.
>>
>> Why we don't have linux-image-rt-amd64 but just linux-image-rt-686-pae?
>
> The build broke on amd64; it will be fixed in the next upload.

Maybe now with 4.0.5-rt3 ? ;)

regards

mira
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Re: debian RT kernel

[Braud Caroline]

Hello,

Here are the steps I have performed:
$apt-get install build-essential fakeroot rsync
$apt-get install subversion subversion-tools
$apt-get build-dep linux
$svn co svn://anonscm.debian.org/svn/kernel/dists/sid/linux
$apt-get source -d linux
$cd linux

and here is the first problem I have:
 $debian/rules orig
debian/rules:59: *** Cannot find orig tarball linux_4.0.4.orig.tar.xz. Arrêt.


Here is what was downloaded by "apt-get source -d linux"
$ ls ../linux*
../linux_3.16.7-ckt9-2.debian.tar.xz  ../linux_3.16.7-ckt9-2.dsc  ../linux_3.16.7-ckt9.orig.tar.xz
../linux:
debian

I guess I should use the version in the link given by Ben:
http://snapshot.debian.org/package/linux/4.0.2-1/

But where is it defined ? 

Here is what I can find using a command in the "rules" file:

$ dpkg-parsechangelog 
Source: linux
Version: 4.0.4-2
Distribution: UNRELEASED
Urgency: medium
Maintainer: Ben Hutchings <ben@decadent.org.uk>
Date: Wed, 27 May 2015 21:36:56 +0100
Closes: 786716 787004 787029
Changes:
 linux (4.0.4-2) UNRELEASED; urgency=medium
 .
   [ Ben Hutchings ]
   * udeb: Remove i2o modules (fixes FTBFS on amd64) (Closes: #787004)
 .
   [ Ian Campbell ]
   * [armhf] Enable PCIe support for IMX6 boards. Patch from Vagrant
     Cascadian (Closes: #787029)
   * [armhf] Add stmmac-platform module to nic-modules udeb. (Closes: #786716)


Thanks ! 
CB

Le Mardi 26 Mai 2015 09:24 CEST, "Braud Caroline" <Caroline.Braud@univ-lille1.fr> a écrit: 
 
> Hello,
> 
> So if I understand well, the installation of RT package in a brand new PC:
> 
> - step 1: installation of a distribution (I have installed debian jessie)
> - step 2: to be able to have access of RT packages in development:
> follow the link you gave me (4.3 and 4.2 steps) by replacing "dist" by "sid"
> - step 3: install RT packages in development using apt-get install (headers and image RT) ??
> 
> Thanks a lot, and sorry for my level in linux kernel ...  
> The RT kernel is very usefull for me and I find the RT-PREEMPT development very interesting :)
> 
> CB
> 
> Le Vendredi 22 Mai 2015 23:22 CEST, Ben Hutchings <ben@decadent.org.uk> a écrit: 
>  
> > On Fri, 2015-05-22 at 17:52 +0200, Braud Caroline wrote:
> > > Hello,
> > > 
> > > Sorry to ask but where is  the Debian packaging repo for 4.0-rt ?
> > 
> > See the kernel handbook:
> > http://kernel-handbook.alioth.debian.org/ch-common-tasks.html#s-common-official-vcs
> > 
> > In this case you want the 'sid' distribution.
> > 
> > Ben.
> > 
> > -- 
> > Ben Hutchings
> > One of the nice things about standards is that there are so many of them.
>  
>  
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
> the body of a message to majordomo@vger.kernel.org
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Debian RT kernel

[Alex]

Note to self: if wanting to test btrfsck and give self a scare don't introduce
the RT version of the same kernel into a (working perfectly) but not
backed-up-to-the-minute btrfs install.

Thanks. That is all.

In other news, KVM on btrfs: I'm finding the guests a little slow now I have two
guests (file not LVM) on KVM. Mainly due to heavy fragmentation I think. Still
using default mounts though.

Any ideas when I autodefrag will make it into the default mounts?
Is autodefrag responsible for the corruptions being fixed in 3.5; followed the
commits and I don't think so but I should ask.

Thank you.