Kernel used on installation media.

Hi all, I hope this is not too off topic.  I've searched the
-devel archives,
but haven't found clear-cut information on this, so thought
I'd ask.

I am trying to determine the kernel configuration used to
build the kernel
used on the installation media (CD #1 or the
vmlinuz/initrd.img files in their
respective images/boot.iso or images/diskboot.img files).

My guess is the kernel configurations are not identical to
the ones ultimately
used to build the kernels used on the system once it is up
and running....

I ask because I am interested in rebuilding the kernel used
on CD #1 to boot
into the installer.

Thanks for any pointers.

Ray
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Am Donnerstag, den 22.02.2007, 17:42 -0800 schrieb Ray Van
Dolson:
> Hi all, I hope this is not too off topic.  I've
searched the -devel archives,
> but haven't found clear-cut information on this, so
thought I'd ask.
> 
> I am trying to determine the kernel configuration used
to build the kernel
> used on the installation media (CD #1 or the
vmlinuz/initrd.img files in their
> respective images/boot.iso or images/diskboot.img
files).
> 
> My guess is the kernel configurations are not identical
to the ones ultimately
> used to build the kernels used on the system once it is
up and running....
> 
> I ask because I am interested in rebuilding the kernel
used on CD #1 to boot
> into the installer.
> 
> Thanks for any pointers.
> 
> Ray

I can only point you to the anaconda-runtime package. I know
I used it
som time ago to do what you want to do now. I cannot tell
you how to use
it thought, since i don't know it anymore. But i bet the
docs in the RPM
and some googling will give you everything you need.

Chris
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On 2/22/07, Ray Van Dolson <rvandolsonesri.com> wrote:
> Hi all, I hope this is not too off topic.  I've
searched the -devel archives,
> but haven't found clear-cut information on this, so
thought I'd ask.
>
> I am trying to determine the kernel configuration used
to build the kernel
> used on the installation media (CD #1 or the
vmlinuz/initrd.img files in their
> respective images/boot.iso or images/diskboot.img
files).
>
> My guess is the kernel configurations are not identical
to the ones ultimately
> used to build the kernels used on the system once it is
up and running....
>
I suspect, if your referring to Centos 4.x it is the same as
the
kernel-smp kernel.  Before RHEL 4, there was a kernel-BOOT
kernel and
that is what anaconda used, but it is not built anymore.

Note, though, I'm only telling you what I suspect and not
what I know
for a fact.  If you posted this question on the
anaconda-devel list
someone there would know the answer for sure.

Cheers...james
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On Fri, Feb 23, 2007 at 10:38:18AM -0500, James Olin Oden
wrote:
> I suspect, if your referring to Centos 4.x it is the
same as the
> kernel-smp kernel.  Before RHEL 4, there was a
kernel-BOOT kernel and
> that is what anaconda used, but it is not built
anymore.

Pretty sure the installer uses the non-smp kernel.

-- 
Matthew Miller           mattdmmattdm.org          <http://mattdm.org/>
Boston University Linux      ------>              <http://linux.bu.edu/>

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On 2/23/07, Matthew Miller <mattdmmattdm.org> wrote:
> On Fri, Feb 23, 2007 at 10:38:18AM -0500, James Olin
Oden wrote:
> > I suspect, if your referring to Centos 4.x it is
the same as the
> > kernel-smp kernel.  Before RHEL 4, there was a
kernel-BOOT kernel and
> > that is what anaconda used, but it is not built
anymore.
>
> Pretty sure the installer uses the non-smp kernel.
Well sure is much better than suspect, so I'd go with that
(-:

Thanks...james
>
> --
> Matthew Miller           mattdmmattdm.org          <http://mattdm.org/>
> Boston University Linux      ------>             
<http://linux.bu.edu/>

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On Fri, Feb 23, 2007 at 02:58:51PM -0800, Scott Silva
wrote:
> James Olin Oden spake the following on 2/23/2007 10:09
AM:
> > On 2/23/07, Matthew Miller
> > <mattdmmattdm.org> wrote:
> >> On Fri, Feb 23, 2007 at 10:38:18AM -0500,
James Olin Oden wrote:
> >> > I suspect, if your referring to Centos
4.x it is the same as the
> >> > kernel-smp kernel.  Before RHEL 4, there
was a kernel-BOOT kernel and
> >> > that is what anaconda used, but it is not
built anymore.
> >>
> >> Pretty sure the installer uses the non-smp
kernel.
> > Well sure is much better than suspect, so I'd go
with that (-:
> > 
> > Thanks...james
> Doesn't the rescue system use the same kernel as the
installer?
> If so, you could uname -a from a prompt in the rescue
system.

True!  I'm just going to try the normal kernel configs and
see what happens.

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Ray Van Dolson wrote:
> Hi all, I hope this is not too off topic.  I've
searched the -devel archives,
> but haven't found clear-cut information on this, so
thought I'd ask.
> 
> I am trying to determine the kernel configuration used
to build the kernel
> used on the installation media (CD #1 or the
vmlinuz/initrd.img files in their
> respective images/boot.iso or images/diskboot.img
files).
> 
> My guess is the kernel configurations are not identical
to the ones ultimately
> used to build the kernels used on the system once it is
up and running....
> 
> I ask because I am interested in rebuilding the kernel
used on CD #1 to boot
> into the installer.
> 

look in the distro tree : 
http://mirror.centos.org/centos/4/os/i386/CentOS/RPMS (
eg, for the i386  )
the kernel-2.6.9-*.<i686|i586>.rpm are the ones used
for the installer, 
each contain a .config file which will give you the config
file used at 
build time for that kernel rpm.

Why do you need to rebuild the installer kernel ? doing
DriverDisks for 
some piece of non-supported-by-default-hardware isnt hard.


-- 
Karanbir Singh : http://www.karan.org/ :
2522219icq
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On Sat, Feb 24, 2007 at 12:06:03AM +0000, Karanbir Singh
wrote:
> Ray Van Dolson wrote:
> >Hi all, I hope this is not too off topic.  I've
searched the -devel 
> >archives,
> >but haven't found clear-cut information on this, so
thought I'd ask.
> >
> >I am trying to determine the kernel configuration
used to build the kernel
> >used on the installation media (CD #1 or the
vmlinuz/initrd.img files in 
> >their
> >respective images/boot.iso or images/diskboot.img
files).
> >
> >My guess is the kernel configurations are not
identical to the ones 
> >ultimately
> >used to build the kernels used on the system once
it is up and running....
> >
> >I ask because I am interested in rebuilding the
kernel used on CD #1 to 
> >boot
> >into the installer.
> >
> 
> look in the distro tree : 
> http://mirror.centos.org/centos/4/os/i386/CentOS/RPMS (
eg, for the i386  )
> the kernel-2.6.9-*.<i686|i586>.rpm are the ones
used for the installer, 
> each contain a .config file which will give you the
config file used at 
> build time for that kernel rpm.

K, so just the same kernel then that's used on the OS.  That
makes it fairly
straightforward.

> Why do you need to rebuild the installer kernel ? doing
DriverDisks for 
> some piece of non-supported-by-default-hardware isnt
hard.

Well, the driver is an updated ata_piix and libsata driver
for the ICH8
chipset.  Neither Intel nor Dell appears to have a driver
for download on
their page.

jbaron's beta release of the -48 kernel for RHEL4 includes
driver support for
it, but obviously the .ko's in his kernel are for the -48
kernel.  I would
either have to backport the driver to the kernel used on the
U4/CentOS install
CD's or update the kernel on those CD's to be -48 and work
with the new
drivers out of the box.

I haven't taken a stab at backporting these drivers into the
current stable
kernels (and kernel used on the boot CD), maybe that would
be easier...
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Ray Van Dolson spake the following on 2/23/2007 4:18 PM:
> On Sat, Feb 24, 2007 at 12:06:03AM +0000, Karanbir
Singh wrote:
>> Ray Van Dolson wrote:
>>> Hi all, I hope this is not too off topic.  I've
searched the -devel 
>>> archives,
>>> but haven't found clear-cut information on
this, so thought I'd ask.
>>>
>>> I am trying to determine the kernel
configuration used to build the kernel
>>> used on the installation media (CD #1 or the
vmlinuz/initrd.img files in 
>>> their
>>> respective images/boot.iso or
images/diskboot.img files).
>>>
>>> My guess is the kernel configurations are not
identical to the ones 
>>> ultimately
>>> used to build the kernels used on the system
once it is up and running....
>>>
>>> I ask because I am interested in rebuilding the
kernel used on CD #1 to 
>>> boot
>>> into the installer.
>>>
>> look in the distro tree : 
>> http://mirror.centos.org/centos/4/os/i386/CentOS/RPMS (
eg, for the i386  )
>> the kernel-2.6.9-*.<i686|i586>.rpm are the
ones used for the installer, 
>> each contain a .config file which will give you the
config file used at 
>> build time for that kernel rpm.
> 
> K, so just the same kernel then that's used on the OS. 
That makes it fairly
> straightforward.
> 
>> Why do you need to rebuild the installer kernel ?
doing DriverDisks for 
>> some piece of non-supported-by-default-hardware
isnt hard.
> 
> Well, the driver is an updated ata_piix and libsata
driver for the ICH8
> chipset.  Neither Intel nor Dell appears to have a
driver for download on
> their page.
> 
> jbaron's beta release of the -48 kernel for RHEL4
includes driver support for
> it, but obviously the .ko's in his kernel are for the
-48 kernel.  I would
> either have to backport the driver to the kernel used
on the U4/CentOS install
> CD's or update the kernel on those CD's to be -48 and
work with the new
> drivers out of the box.
> 
> I haven't taken a stab at backporting these drivers
into the current stable
> kernels (and kernel used on the boot CD), maybe that
would be easier...
See if you can get a src rpm. He probably added that patch
the "approved"
RedHat way, and it should be in the src rpm. You could add
it to the current
src and check at what point the .spec file adds that patch.
Then just build
and see.

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Ray Van Dolson wrote:
> jbaron's beta release of the -48 kernel for RHEL4
includes driver support for
> it, but obviously the .ko's in his kernel are for the
-48 kernel.  I would
> either have to backport the driver to the kernel used
on the U4/CentOS install
> CD's or update the kernel on those CD's to be -48 and
work with the new
> drivers out of the box.
> 
> I haven't taken a stab at backporting these drivers
into the current stable
> kernels (and kernel used on the boot CD), maybe that
would be easier...

you might want to readup on how EL/CentOS kernels work w.r.t
KABI/VerMagic

Also, have you actually *tried* using the .ko's ?  you might
need more 
than just the .ko itself ( like, the dep chain )

-- 
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2522219icq
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