[lm-sensors] grafting lm-sensors 2.10.1 onto red hat kernel

[lm-sensors] grafting lm-sensors 2.10.1 onto red hat kernel

[Steven Timm]

Has anyone successfully managed to compile i2c 2.10.1 and lm_sensors 
2.10.1 so that they work with kernels such as "2.6.9-42.0.2.ELsmp" as
distributed with Red Hat Enterprise Linux 4?

For some of the 2.9 version of lm_sensors there used to be
lm_sensors-kmdl and i2c-kmdl rpms available in the ATRPMS repository
but now I do not see those anymore.  any hints are welcome.

Steve Timm


-- 
------------------------------------------------------------------
Steven C. Timm, Ph.D  (630) 840-8525  timm at fnal.gov  http://home.fnal.gov/~timm/
Fermilab Computing Div/Core Support Services Dept./Scientific Computing Section
Assistant Group Leader, Farms and Clustered Systems Group
Lead of Computing Farms Team

[lm-sensors] grafting lm-sensors 2.10.1 onto red hat kernel

[Jean Delvare]

Hi Steven,

On Wed, 25 Oct 2006 10:59:20 -0500 (CDT), Steven Timm wrote:
> 
> Has anyone successfully managed to compile i2c 2.10.1 and lm_sensors 
> 2.10.1 so that they work with kernels such as "2.6.9-42.0.2.ELsmp" as
> distributed with Red Hat Enterprise Linux 4?
>
> For some of the 2.9 version of lm_sensors there used to be
> lm_sensors-kmdl and i2c-kmdl rpms available in the ATRPMS repository
> but now I do not see those anymore.  any hints are welcome.

For 2.6 kernels, you don't need the separate module packages,
everything's already in the kernel tree. All you need is the user-space
part of lm_sensors, which is available from ATrpms:
http://atrpms.net/dist/el4/lm_sensors/

-- 
Jean Delvare

[lm-sensors] grafting lm-sensors 2.10.1 onto red hat kernel

[Steven Timm]

On Wed, 25 Oct 2006, Jean Delvare wrote:

> Hi Steven,
>
> On Wed, 25 Oct 2006 10:59:20 -0500 (CDT), Steven Timm wrote:
>>
>> Has anyone successfully managed to compile i2c 2.10.1 and lm_sensors
>> 2.10.1 so that they work with kernels such as "2.6.9-42.0.2.ELsmp" as
>> distributed with Red Hat Enterprise Linux 4?
>>
>> For some of the 2.9 version of lm_sensors there used to be
>> lm_sensors-kmdl and i2c-kmdl rpms available in the ATRPMS repository
>> but now I do not see those anymore.  any hints are welcome.
>
> For 2.6 kernels, you don't need the separate module packages,
> everything's already in the kernel tree. All you need is the user-space
> part of lm_sensors, which is available from ATrpms:
> http://atrpms.net/dist/el4/lm_sensors/
>

The kernel as distributed by Red Hat in RHEL4 update 4
(2.6.9-42.0.3) has got
an lm_sensors and i2c in there already but it is a very old version, 
2.8.7.  That is not new enough to support certain chips on new hardware,
particularly the w83792 sensor.  Has anyone successfully
been able to patch the latest 2.10.1 lm_sensors against that
old kernel, and if so, how?


Steve Timm



>

-- 
------------------------------------------------------------------
Steven C. Timm, Ph.D  (630) 840-8525  timm at fnal.gov  http://home.fnal.gov/~timm/
Fermilab Computing Div/Core Support Services Dept./Scientific Computing Section
Assistant Group Leader, Farms and Clustered Systems Group
Lead of Computing Farms Team

[lm-sensors] grafting lm-sensors 2.10.1 onto red hat kernel

[Mark M. Hoffman]

Hi Steve:

* Steven Timm <timm at fnal.gov> [2006-10-25 12:36:24 -0500]:
> On Wed, 25 Oct 2006, Jean Delvare wrote:
> 
> > Hi Steven,
> >
> > On Wed, 25 Oct 2006 10:59:20 -0500 (CDT), Steven Timm wrote:
> >>
> >> Has anyone successfully managed to compile i2c 2.10.1 and lm_sensors
> >> 2.10.1 so that they work with kernels such as "2.6.9-42.0.2.ELsmp" as
> >> distributed with Red Hat Enterprise Linux 4?
> >>
> >> For some of the 2.9 version of lm_sensors there used to be
> >> lm_sensors-kmdl and i2c-kmdl rpms available in the ATRPMS repository
> >> but now I do not see those anymore.  any hints are welcome.
> >
> > For 2.6 kernels, you don't need the separate module packages,
> > everything's already in the kernel tree. All you need is the user-space
> > part of lm_sensors, which is available from ATrpms:
> > http://atrpms.net/dist/el4/lm_sensors/
> >
> 
> The kernel as distributed by Red Hat in RHEL4 update 4
> (2.6.9-42.0.3) has got
> an lm_sensors and i2c in there already but it is a very old version, 
> 2.8.7.  That is not new enough to support certain chips on new hardware,
> particularly the w83792 sensor.  Has anyone successfully
> been able to patch the latest 2.10.1 lm_sensors against that
> old kernel, and if so, how?

The lm-sensors project has two parts: 
1) a userspace part, including the sensors(1) program and libsensors(3) library
2) the Linux kernel drivers for the i2c bus and sensor chips

We maintain the kernel drivers for the 2.6 series directly in Linus' tree now.
The trouble is, you're using 2.6.9-something which does not contain support
for your device - not surprising since 2.6.9 is a few days over 2 years old
by now.

To support the w83792 sensor on that old kernel, someone will have to back-
port the current driver so that it works with 2.6.9.  My guess is that you
will not get any volunteers to do this (not particularly interesting) work.
Although, it shouldn't be very hard for a decent C programmer to do it...
maybe that is you or someone you work with.

Another option could be to upgrade to a newer kernel that does support the
device.

In either case, you will need to upgrade from the 2.8.7 package of lm-sensors
to something much newer, which should be no problem.

Regards,

-- 
Mark M. Hoffman
mhoffman at lightlink.com

[lm-sensors] grafting lm-sensors 2.10.1 onto red hat kernel

[Steven Timm]

>>
>> The kernel as distributed by Red Hat in RHEL4 update 4
>> (2.6.9-42.0.3) has got
>> an lm_sensors and i2c in there already but it is a very old version,
>> 2.8.7.  That is not new enough to support certain chips on new hardware,
>> particularly the w83792 sensor.  Has anyone successfully
>> been able to patch the latest 2.10.1 lm_sensors against that
>> old kernel, and if so, how?
>
> The lm-sensors project has two parts:
> 1) a userspace part, including the sensors(1) program and libsensors(3) library
> 2) the Linux kernel drivers for the i2c bus and sensor chips
>
> We maintain the kernel drivers for the 2.6 series directly in Linus' tree now.
> The trouble is, you're using 2.6.9-something which does not contain support
> for your device - not surprising since 2.6.9 is a few days over 2 years old
> by now.

What was 2.6.9 in Linus' tree and what Red HAt distributes are quite 
different.  They grab a lot of the newer patches from the newer kernels
but evidently not these ones.  I guess I am just going to have to
open a ticket with Red Hat and ask them to include these into
their next version.
>
> To support the w83792 sensor on that old kernel, someone will have to back-
> port the current driver so that it works with 2.6.9.  My guess is that you
> will not get any volunteers to do this (not particularly interesting) work.
> Although, it shouldn't be very hard for a decent C programmer to do it...
> maybe that is you or someone you work with.

IF we do this we have to get the latest i2c as well as the latest 
lm_sensors back-ported there, don't we?
>
> Another option could be to upgrade to a newer kernel that does support the
> device.
>
Not an option here because we are depending on Red Hat for security 
updates on this kernel and thus want to leave the underlying kernel
as untouched as possible.  This was possible in the 2.4 kernel series.
I can't believe we are the only site in this situation.  There are a lot
of others that try to run with the enterprise kernels and it would
seem there should be quite a bit of interest in this.

Steve


> In either case, you will need to upgrade from the 2.8.7 package of lm-sensors
> to something much newer, which should be no problem.
>
> Regards,
>
> -- 
> Mark M. Hoffman
> mhoffman at lightlink.com
>
>

[lm-sensors] grafting lm-sensors 2.10.1 onto red hat kernel

[Axel Thimm]

On Wed, Oct 25, 2006 at 08:13:38PM -0500, Steven Timm wrote:
> >>
> >> The kernel as distributed by Red Hat in RHEL4 update 4
> >> (2.6.9-42.0.3) has got
> >> an lm_sensors and i2c in there already but it is a very old version,
> >> 2.8.7.  That is not new enough to support certain chips on new hardware,
> >> particularly the w83792 sensor.  Has anyone successfully
> >> been able to patch the latest 2.10.1 lm_sensors against that
> >> old kernel, and if so, how?
> >
> > The lm-sensors project has two parts:
> > 1) a userspace part, including the sensors(1) program and libsensors(3) library
> > 2) the Linux kernel drivers for the i2c bus and sensor chips
> >
> > We maintain the kernel drivers for the 2.6 series directly in Linus' tree now.
> > The trouble is, you're using 2.6.9-something which does not contain support
> > for your device - not surprising since 2.6.9 is a few days over 2 years old
> > by now.
> 
> What was 2.6.9 in Linus' tree and what Red HAt distributes are quite 
> different.  They grab a lot of the newer patches from the newer kernels
> but evidently not these ones.  I guess I am just going to have to
> open a ticket with Red Hat and ask them to include these into
> their next version.

I think that's the best option. See for example

  https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id\x171507

where a similar request resulted in an updated RHEL4 kernel in May
(officially released as errata in August).

> > To support the w83792 sensor on that old kernel, someone will have to back-
> > port the current driver so that it works with 2.6.9.  My guess is that you
> > will not get any volunteers to do this (not particularly interesting) work.
> > Although, it shouldn't be very hard for a decent C programmer to do it...
> > maybe that is you or someone you work with.
> 
> IF we do this we have to get the latest i2c as well as the latest 
> lm_sensors back-ported there, don't we?
> >
> > Another option could be to upgrade to a newer kernel that does support the
> > device.
> >
> Not an option here because we are depending on Red Hat for security 
> updates on this kernel and thus want to leave the underlying kernel
> as untouched as possible.  This was possible in the 2.4 kernel series.
> I can't believe we are the only site in this situation.  There are a lot
> of others that try to run with the enterprise kernels and it would
> seem there should be quite a bit of interest in this.

In that case post the bugzilla URL here and invite people to join the
request. If the demand is demonstrated to some extend the next RHEL4
update may have updated i2c/lm_sensors bits which everyone would
welcome.
-- 
Axel.Thimm at ATrpms.net
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[lm-sensors] grafting lm-sensors 2.10.1 onto red hat kernel

[Steven Timm]

On Wed, 25 Oct 2006, Jean Delvare wrote:

> Hi Steven,
>
> On Wed, 25 Oct 2006 10:59:20 -0500 (CDT), Steven Timm wrote:
>>
>> Has anyone successfully managed to compile i2c 2.10.1 and lm_sensors
>> 2.10.1 so that they work with kernels such as "2.6.9-42.0.2.ELsmp" as
>> distributed with Red Hat Enterprise Linux 4?
>>
>> For some of the 2.9 version of lm_sensors there used to be
>> lm_sensors-kmdl and i2c-kmdl rpms available in the ATRPMS repository
>> but now I do not see those anymore.  any hints are welcome.
>
> For 2.6 kernels, you don't need the separate module packages,
> everything's already in the kernel tree. All you need is the user-space
> part of lm_sensors, which is available from ATrpms:
> http://atrpms.net/dist/el4/lm_sensors/
>
>

I guess what I am really trying to get at here is the following:
If I just take the source code for the various modules I want
from the lm_sensors 2.10.x tree and patch it into a 2.6.9 kernel,
is it going to compile, or is the source code out there only
good to compile into 2.4 kernels.

Has nobody ever tried to patch the latest lm_sensors code
into a 2.6.9. enterprise kernel?  Under enterprise linux 3
we used to do this all the time, I don't understand why
nobody has tried to do it in Enterprise linux 4.

Steve Timm




-- 
------------------------------------------------------------------
Steven C. Timm, Ph.D  (630) 840-8525  timm at fnal.gov  http://home.fnal.gov/~timm/
Fermilab Computing Div/Core Support Services Dept./Scientific Computing Section
Assistant Group Leader, Farms and Clustered Systems Group
Lead of Computing Farms Team

[lm-sensors] grafting lm-sensors 2.10.1 onto red hat kernel

[Axel Thimm]

On Mon, Oct 30, 2006 at 11:17:08AM -0600, Steven Timm wrote:
> On Wed, 25 Oct 2006, Jean Delvare wrote:
> 
> > Hi Steven,
> >
> > On Wed, 25 Oct 2006 10:59:20 -0500 (CDT), Steven Timm wrote:
> >>
> >> Has anyone successfully managed to compile i2c 2.10.1 and lm_sensors
> >> 2.10.1 so that they work with kernels such as "2.6.9-42.0.2.ELsmp" as
> >> distributed with Red Hat Enterprise Linux 4?
> >>
> >> For some of the 2.9 version of lm_sensors there used to be
> >> lm_sensors-kmdl and i2c-kmdl rpms available in the ATRPMS repository
> >> but now I do not see those anymore.  any hints are welcome.
> >
> > For 2.6 kernels, you don't need the separate module packages,
> > everything's already in the kernel tree. All you need is the user-space
> > part of lm_sensors, which is available from ATrpms:
> > http://atrpms.net/dist/el4/lm_sensors/
> >
> >
> 
> I guess what I am really trying to get at here is the following:
> If I just take the source code for the various modules I want
> from the lm_sensors 2.10.x tree and patch it into a 2.6.9 kernel,
> is it going to compile, or is the source code out there only
> good to compile into 2.4 kernels.
> 
> Has nobody ever tried to patch the latest lm_sensors code
> into a 2.6.9. enterprise kernel?  Under enterprise linux 3
> we used to do this all the time, I don't understand why
> nobody has tried to do it in Enterprise linux 4.

Of course, that happens from time to time by the distribution
vendor. I already posted a bugzilla entry of a previous kernel merge:

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id\x171507

And if you look into the current src.rpm you'll find the patch to
2.6.9 of lm_sensors' code of that time.

What you really want is to notify RH about the need for updating this
patch against recent lm_sensors' code and hope to get it approved to
enter the next kernel errata. If you are in a hurry you don't need to
wait until RH's QA is done, usually the upcoming kernel rpms & patches
are released at J. Baron's redhat.com web space.
-- 
Axel.Thimm at ATrpms.net
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[lm-sensors] grafting lm-sensors 2.10.1 onto red hat kernel

[Steven Timm]

J. Baron's latest patch still reflects a pre-2.9.x version of
lm_sensors as far as I can tell.  I will try to open
a ticket with Red Hat on this.  Thanks

Steve Timm


On Mon, 30 Oct 2006, Axel Thimm wrote:

> On Mon, Oct 30, 2006 at 11:17:08AM -0600, Steven Timm wrote:
>> On Wed, 25 Oct 2006, Jean Delvare wrote:
>>
>>> Hi Steven,
>>>
>>> On Wed, 25 Oct 2006 10:59:20 -0500 (CDT), Steven Timm wrote:
>>>>
>>>> Has anyone successfully managed to compile i2c 2.10.1 and lm_sensors
>>>> 2.10.1 so that they work with kernels such as "2.6.9-42.0.2.ELsmp" as
>>>> distributed with Red Hat Enterprise Linux 4?
>>>>
>>>> For some of the 2.9 version of lm_sensors there used to be
>>>> lm_sensors-kmdl and i2c-kmdl rpms available in the ATRPMS repository
>>>> but now I do not see those anymore.  any hints are welcome.
>>>
>>> For 2.6 kernels, you don't need the separate module packages,
>>> everything's already in the kernel tree. All you need is the user-space
>>> part of lm_sensors, which is available from ATrpms:
>>> http://atrpms.net/dist/el4/lm_sensors/
>>>
>>>
>>
>> I guess what I am really trying to get at here is the following:
>> If I just take the source code for the various modules I want
>> from the lm_sensors 2.10.x tree and patch it into a 2.6.9 kernel,
>> is it going to compile, or is the source code out there only
>> good to compile into 2.4 kernels.
>>
>> Has nobody ever tried to patch the latest lm_sensors code
>> into a 2.6.9. enterprise kernel?  Under enterprise linux 3
>> we used to do this all the time, I don't understand why
>> nobody has tried to do it in Enterprise linux 4.
>
> Of course, that happens from time to time by the distribution
> vendor. I already posted a bugzilla entry of a previous kernel merge:
>
> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id\x171507
>
> And if you look into the current src.rpm you'll find the patch to
> 2.6.9 of lm_sensors' code of that time.
>
> What you really want is to notify RH about the need for updating this
> patch against recent lm_sensors' code and hope to get it approved to
> enter the next kernel errata. If you are in a hurry you don't need to
> wait until RH's QA is done, usually the upcoming kernel rpms & patches
> are released at J. Baron's redhat.com web space.
>

-- 
------------------------------------------------------------------
Steven C. Timm, Ph.D  (630) 840-8525  timm at fnal.gov  http://home.fnal.gov/~timm/
Fermilab Computing Div/Core Support Services Dept./Scientific Computing Section
Assistant Group Leader, Farms and Clustered Systems Group
Lead of Computing Farms Team

[lm-sensors] grafting lm-sensors 2.10.1 onto red hat kernel

[Jean Delvare]

Hi Steven,

On 10/30/2006, Steven Timm wrote:
> J. Baron's latest patch still reflects a pre-2.9.x version of
> lm_sensors as far as I can tell.  I will try to open
> a ticket with Red Hat on this.  Thanks

It's important that you understand that there is no relation between the
drivers in the lm_sensors package, which are for Linux 2.4, and the i2c
and hardware monitoring drivers in the Linux 2.6 kernel tree. This is
completely different code, and support for some chips is available on
one side and not on the other side. And this is going to diverge even
more in the future, as the 2.4 kernel driver set is more or less in
maintenance mode and newer hardware is rather unlikely to be ever
supported on 2.4 kernels.

So if you're going to ask Red Hat to add support for some hardware
monitoring devices to their RHEL4 product, do not ask them to add
lm_sensors 2.10.x drivers, it simply doesn't make sense. Instead, ask
them to backport hardware monitoring drivers from later 2.6 kernels.

They might have to also update user-space support from the lm_sensors
project for these backported drivers, but that's a separate issue.

--
Jean Delvare

[lm-sensors] grafting lm-sensors 2.10.1 onto red hat kernel

[Steven Timm]

Is the w83792d chip one of those supported in the newer 2.6 kernels?
that's the main one I need that the current redhat distro kernel doesn't 
have.

Also, which version of the Linus' 2.6 kernel tree should I point them at
to get the current production code level?

Steve Timm


On Tue, 31 Oct 2006, Jean Delvare wrote:

>
> Hi Steven,
>
> On 10/30/2006, Steven Timm wrote:
>> J. Baron's latest patch still reflects a pre-2.9.x version of
>> lm_sensors as far as I can tell.  I will try to open
>> a ticket with Red Hat on this.  Thanks
>
> It's important that you understand that there is no relation between the
> drivers in the lm_sensors package, which are for Linux 2.4, and the i2c
> and hardware monitoring drivers in the Linux 2.6 kernel tree. This is
> completely different code, and support for some chips is available on
> one side and not on the other side. And this is going to diverge even
> more in the future, as the 2.4 kernel driver set is more or less in
> maintenance mode and newer hardware is rather unlikely to be ever
> supported on 2.4 kernels.
>
> So if you're going to ask Red Hat to add support for some hardware
> monitoring devices to their RHEL4 product, do not ask them to add
> lm_sensors 2.10.x drivers, it simply doesn't make sense. Instead, ask
> them to backport hardware monitoring drivers from later 2.6 kernels.
>
> They might have to also update user-space support from the lm_sensors
> project for these backported drivers, but that's a separate issue.
>
> --
> Jean Delvare
>

-- 
------------------------------------------------------------------
Steven C. Timm, Ph.D  (630) 840-8525  timm at fnal.gov  http://home.fnal.gov/~timm/
Fermilab Computing Div/Core Support Services Dept./Scientific Computing Section
Assistant Group Leader, Farms and Clustered Systems Group
Lead of Computing Farms Team

[lm-sensors] grafting lm-sensors 2.10.1 onto red hat kernel

[Jean Delvare]

Hi Steven,

On 10/31/2006, Steven Timm wrote:
> Is the w83792d chip one of those supported in the newer 2.6 kernels?
> that's the main one I need that the current redhat distro kernel doesn't
> have.

Yes it is. The w83792d driver was added in Linux 2.6.14, according to:
http://www.lm-sensors.org/wiki/Devices
Note that there's a link to a version of the driver for older kernels,
which might come in handy in this case. That version might lack the
latest fixes though.

> Also, which version of the Linus' 2.6 kernel tree should I point them at
> to get the current production code level?

Latest stable kernel, of course (i.e. at the moment: 2.6.18.1).

--
Jean Delvare