Re: [gentoo-user] kernel 2.6 upgrade howto

[Jean-Francois Gagnon Laporte]

On Mon, 6 Dec 2004 19:57:15 +0100, Maarten <gentoo@××××××××.org> wrote:
> On Monday 06 December 2004 19:23, Jean-Francois Gagnon Laporte wrote:
> > On Mon, 6 Dec 2004 18:47:43 +0100, Maarten <gentoo@××××××××.org> wrote:
>
> > > I think I correctly upgraded 2004.2 to 2004.3 but how do I check that to
> > > make sure?
> >
> > Okay let's divide the questions shall we. There isn't really any
> > revision to gentoo. I think you have switched your profile am I right
>
> If that is what I think it is, yes. [Changing some symlink somewhere I forgot]

If so yes you changed the profile.

>
> > >  The machine did not do anything spectacular when I made that change,
> > > is that expected behaviour ?
> >
> > If you were up to date with your local portage tree and recently
> > update your installation there is no reason to anything since you
> > already up to date. You only switched profile from what I can read.
>
> indeed.  So the kernel is not updated with changing profiles ?
> (or at least, not when going from 2004.2 to 2004.3)
>

No you have to emerge a different sources like gentoo-dev-sources
instead of gentoo-sources.

> > >  Now for the fullfillment of the transition to 2004.3 I need a kernel
> > > 2.6, right ?
> >
> > Not really, AFAIK gentoo hasn't switched to 2.6 by default. If you
> > still need to you can run a 2.4 kernel without any problems except you
> > will miss some goodies. But, if you aren't confortable with 2.6 or
> > even a linux kernel you might want to stick with a 2.4 kernel. It just
> > works.
>
> I run linux kernels since 1996, so I should be "comfortable" with them. ;-)
> I (wrongly) assumed gentoo-latest-rev used a 2.6 kernel so I was unsure how to
> transistion to 2004.3.  So, that is cleared up now.
> However, I will still want to run with 2.6, definitely.
>

If that's the case i'll go less easy on you ^_^ (just joking) . You
might find this page useful :

http://packages.gentoo.org/packages/?category=sys-kernel

You should be able to pick a kernel that fits your needs. I would
suggest using gentoo-dev-sources at first if you just want a 2.6
kernel that works.

>
>
> > >  Can someone point me to the docs that
> > > detail that step cause I could not find that very well.
> >
> > Sure here ya go. It still has that fresh smell from the oven (It has
> > been updated recently)
> >
> > http://www.gentoo.org/doc/en/migration-to-2.6.xml
> >
> > May I suggest you go to www.gentoo.org and look at the left side of
> > the navbar to see a big category called Documentation. Check out the
> > user docs section it's pretty good.
>
> Of course I did.  In fact I couldn't have installed gentoo without it. :-)
> (Those are real fine docs by the way. Kudos!)
> Somehow I overlooked that migration document. I guess it's just all too new
> and confusing and overwhelming the first few visits...  My bad.  Thanks!

There is a resume at the end of the page (
http://www.gentoo.org/doc/en/index.xml#doc_chap7 ) But hey it's monday
for everybody !  The gentoo devs are working on rebuilding the web
site to be more accessible. The main design has been approved a while
ago so I hope this year we'll be able to enjoy the face lift.
>
> > > How do I make sure I retain my current kernel as a second boot option if
> > > the 2.6 kernel will not boot ?
> >
> > What boot loader are you using ? Lilo or grub ? Here's my grub.conf
> > that you might find useful :
>
> Grub.conf will work.  My question was rather, will one kernel not overwrite
> another (as is sadly the case with a lot of other linux distributions).
>

That depends on how do you compile your kernel really. I do it this way :

make && make modules_install install

It will build a 2.6.x kernel, install the relevant modules it just
build and copy the bzimage at the root of /boot as vmlinuz (the
.config and System-map is also copied by padding the revision number
at the end). If it already find vmlinuz it will rename the old kernel
as kernel.old ( the old config and System-map too). What I do when I
like a kernel is to copy the working vmlinuz to vmlinuz.working with
it's config and System-map and append .working. That way it's never
clobbered when I don't want too. It's the solution for the lazy people
like me. Here's a snapshot of my /boot since I'm probably not coherent
enough :

ls -l /boot                                                           
                             ~
total 5149
lrwxr-xr-x  1 root root      26 Nov 24 09:45 System.map ->
System.map-2.6.9-gentoo-r6
-rw-r--r--  1 root root  867019 Nov 24 09:45 System.map-2.6.9-gentoo-r6
-rw-r--r--  1 root root  867019 Nov 24 09:53 System.map.working
lrwxrwxrwx  1 root root       1 May  5  2004 boot -> .
-rw-r--r--  1 root root     512 Apr 18  2003 boot.0300
lrwxr-xr-x  1 root root      22 Nov 24 09:45 config -> config-2.6.9-gentoo-r6
-rw-r--r--  1 root root   29390 Nov 24 09:45 config-2.6.9-gentoo-r6
-rw-r--r--  1 root root   29390 Nov 24 09:54 config.working
-rw-r--r--  1 root root    1475 Nov 24 10:02 debug.log
drwxr-xr-x  2 root root    1024 Dec  1 09:43 grub
-rw-r--r--  1 root root   41895 Jul 27 13:07 initrd-1024x768
drwx------  2 root root    1024 Aug 16 12:07 lost+found
-rw-------  1 root root  161792 Oct  8  2003 map
-rw-r--r--  1 root root     256 Apr 18  2003 qc-latin1.klt
lrwxr-xr-x  1 root root      23 Nov 24 09:45 vmlinuz -> vmlinuz-2.6.9-gentoo-r6
-rw-r--r--  1 root root 1618407 Nov 24 09:45 vmlinuz-2.6.9-gentoo-r6
-rw-r--r--  1 root root 1618407 Nov 24 09:53 vmlinuz.working

> One last question:  Do you need to re-run grub-install after changing this
> file or is it 'okay to go'.  (you'll note I come from the lilo world ;-)
>

Nope grub doesn't need to be reinstalled. It scans it's configs on the
fly so you only need to edit grub.conf and that's it. Oh and welcome
to the light side lol.

> >
> > Hopes this will help you out
>
> Yes, I think it did.  Thanks again.
>
> > Jean-Francois
>
>
>
> Maarten
>
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