[plug] Kernel compile

[garry]

It is far far better to have compiled and failed, than to never have compiled 
at all.

*sigh*

Garry


On Wed, 5 Mar 2003 15:07, J Michael Gilks alleged:
> Ok, just tried out the new kernel. Didn't work, got a kernel panic message.
> However I am now feeling brave enough to redo the compile. I obviously left
> out something I shouldn't have. Trying too hard to cut down the size and
> not include drivers for non installed hardware etc.
> Looked like some interesting laptop stuff loading before it died though.
> Thanks for the help.
> I will continue now that I know how to do this and, most importantly, that
> I can recover and use the old kernel.
> Love
> Mike.
>
> On Wednesday 05 Mar 2003 9:37 am, Tony Breeds wrote:
> > On Wed, Mar 05, 2003 at 12:00:51AM +0800, J Michael Gilks wrote:
> > > I have just compiled my first kernel, and as always there is a hitch.
> > > The kernel is 2.4.19-24mdkcustom which is Mandrakes latest offering.
> > > The problem is that I installed the RPM for the kernel which installed
> > > nicely and seems to work. This put a System.map file in /boot.
> > > I compiled a new kernel from the source, did make dep, make clean make
> > > bzImage, make modules, make modules_install.
> >
> > If you're on a sinngle CPU system you can do:
> > make bzImage modules modules_install, then get a coffee.  If anything
> > goes wrong at all at any stage the build will stop so you're safe in
> > that regard.
> >
> > Then make install modules_install.
> >
> > > All going swimmingly until I come to install the new image. When I try
> > > cp System.map /boot
> > > I am asked if I want to overwrite System.map.
> > > This is where I bailed.
> > > My question is, will overwriting System .map lose the 2.4.19-24 kernel
> > > I already have? If this will happen, what can I do to keep both
> > > versions?
> >
> > Yes you can keep both versions.  you should be able to "make install"
> > have a look at /sbin/installkernel.
> > If you look at /boot/System.map you _should_ see that it's a symlink to
> > System.map-INSTALLED_VERSION.
> >
> > If you overwrite it nothing bad will happen.
> >
> > > Further questions I probably should have asked before starting are
> > > 1: After running depmod -a, will old dependencies be wiped out if not
> > > needed for the new kernel?
> >
> > Running depmod -a will rebuild the module dependancies for the currently
> > running system.  You can build the modules dependancies for a non runing
> > kernel with
> > depmod -ae -F /path/to/System.map  where System.mnap is the symbol table
> > for the kernel you want to build module dependancies for.
> >
> > > 2: How do you uninstall a kernel?
> >
> > If you installed it as an RPM then,
> > a) boot into another kernel
> > b) rpm -e rpmname
> > If you instlled it from source then
> > rm -rf /boot/*VERSION /lib/modules/VERSION
> >
> > Yours Tony