Re: RPM that installs a slightly modified Redhat kernel

[Joe Van Dyk <joevandyk gmail com>]

On 2/6/06, Joe Van Dyk <joevandyk gmail com> wrote:
> On 2/1/06, Joe Van Dyk <joevandyk gmail com> wrote:
> > On 1/3/06, James Olin Oden <james oden gmail com> wrote:
> > > On 1/3/06, Joe Van Dyk <joevandyk gmail com> wrote:
> > > > Hi,
> > > >
> > > > We're running Redhat Enterprise 3 here, updates between 1 and 5.  I
> > > > need to modify the kernel (a two line patch that modifies some
> > > > capabilities).
> > > >
> > > > What's the best way to do this?  It needs to work on any RHEL 3 system
> > > > (up to Update 5).  Do I need to build a kernel (and kernel modules)
> > > > RPM for each update?
> > > >
> > > Start with the kernel srpm.  Do a:
> > >
> > >    rpmbuild -bp kernel-*.src.rpm
> > >
> > > Replacing * with the approriate version and release.   Then go into
> > > the directory where the kernel was extracted and generate your patch.
> > >  Now change the spec file to apply your patch and your done concerning
> > > the kernel (of course you will need to integrate this into your build
> > > system du jour).
> > >
> > > If you have custom modules you will need to rebuild them against this
> > > kernel's sources.   If you have questions concerning this, ask and I
> > > or someone can help.
> > > Just so you know since its not likely that any symbol changes are
> > > occuring, the only thing that is forcing the rebuild of the modules is
> > > the fact that kernel symbol versioning is on, which will cause all
> > > symbols in the kernel to have some magic number attached to them such
> > > that your module does call printf but really printf_###### or
> > > something like that.  This changes each time the kernel is rebuilt (I
> > > am painting with a broad brush I know).
> >
> > One of the things I'm changing in the kernel is the timing (to 960hz).
> >  Would I also need to rebuild an RPM for the kernel modules?
>
> Anyone know?  I'm unsure of the relationship between the kernel module
> rpm and the kernel rpm.  Do they need to be built together?  Do they
> depend on each other?  If I change the timing in the kernel rpm, would
> I need to somehow change it in the module rpm?

Oops.  For some reason, only the BOOT kernel RPM was built (which has
a minimal set of drivers).  I'm trying to build a SMP kernel, and that
RPM didn't get built for some reason.

Still investigating...