[Click] Is there a good "dumb-moron" guide to kernel mode?

[Paine, Thomas Asa]

        Also make sure LVM support is being compiled INTO the kernel and not just as a kernel module.  It would need to be a static part of the kernel so it's available at boot time.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   Thomas Paine {paineta at uwec.edu)}
   University of Wisconsin - Eau Claire
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

-----Original Message-----
From: click-bounces at pdos.csail.mit.edu [mailto:click-bounces at pdos.csail.mit.edu] On Behalf Of Anand Kanagala
Sent: Thursday, January 18, 2007 5:11 PM
To: Nicholas Weaver
Cc: click at pdos.csail.mit.edu
Subject: Re: [Click] Is there a good "dumb-moron" guide to kernel mode?

On 1/18/07, Nicholas Weaver <nweaver at icsi.berkeley.edu> wrote:
> On Thu, Jan 11, 2007 at 10:57:46PM +0200, Beyers Cronje composed:
> > Hi Nicholas,
> >
> > I also use Fedora, FC 4 was the latest I've installed. I start with
> > the default config at:
> >
> > /usr/src/kernels/2.6.11-1.1369_FC4-smp-i686/.config   , apply the click
> > kernel patch, and compile and install the vanilla kernel using this config.
> > The only thing that does not work is 'make install' adds a new entry
> > in /boot/grub/grub.conf for the vanilla kernel, but the root=LABEL=/
> > kernel option tag does not work. I just manually change this tag to
> > my root drive i.e. root=/dev/sda1 and everything works fine from there on.
>
> Thanks.  I think this is my problem, but I don't know what the right
> incantation for root= should be..
>
> For the default in grub
> kernel /vmlinuz-2.6.16.22 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
>
> doesn't work (of course), bailing out with the "Unable to find device
> mapper" "No Volume groups found" "Volume Group ''VolGroup00'' not
> found" and related errors.
>
> But when I do it manually to be root=/dev/sda1 (or sda, sda2 etc, its
> two disks sda and sdb I belive, but df doesn't help me as it shows me
> it as /dev/VolGroup/LogVol00 as /)
>
>
> (The starting point is a Fedora Core 6 install fully updated, using
> the 2.6.16.22 kernel from kernel.org with the click patches.  Without
> the click patches, that kernel boots fine with the default root=
> arguments)
>
>
> Suggestions?

Are you enabling LVM support when configuring the kernel?


>
> Thanks for everybody's help.
>
> (HW is a PowerEdge 850, base linux is FC6 fully updated, kernel being
> modified is 2.6.16.22 with the click patches)
>
>
> > One last thing, I do a full FC install, so all programming tools etc
> > are installed by default through the FC install.
> >
> > Hope that helps.
> >
> > Beyers
> >
> >
> > On 1/11/07, Eddie Kohler <kohler at cs.ucla.edu> wrote:
> > >
> > >The easiest thing to do is to take the working .config and copy it.
> > >
> > >Compiling linux with that config generally takes forever and a day
> > >because of the number of modules compiled.
> > >
> > >How to find the config?  /lib/modules/VERSION/build/........  Poke
> > >around there.  Also you can install kernel source RPMs.  Perhaps
> > >someone else has more detailed advice, my memory is faulty.
> > >
> > >Eddie
> > >
> > >
> > >Nicholas Weaver wrote:
> > >> n Thu, Jan 11, 2007 at 09:02:06AM -0800, Eddie Kohler composed:
> > >>> In my experience the hard part is finding the config that works.
> > >>> After that you're home free.  Before that I generally want to
> > >>> cry.  What type of wedge are you seeing?  I generally use Red Hat/Fedora based distros.
> > >>
> > >> Question: would the broadcom on-board NIC cause things to screw
> > >> up as well?  EG, should I just disable it and only have the Intel NICs?
> > >>
> > >> Was Fedora Core latest, but using a vanilla kernel.  2.6.16.13
> > >> built
> > >with
> > >> click.
> > >>
> > >> I think I may have screwed up something very low level early,
> > >> because its failing by "unable to fine device-mapper major/minor"
> > >>
> > >>
> > >> (I haven't done much kernel building etc).
> > >>
> > >> What configuration etc have you used succesfully?  I can nuke and
> > >> reinstall this machine however I want.
> > >>
> > >_______________________________________________
> > >click mailing list
> > >click at amsterdam.lcs.mit.edu
> > >https://amsterdam.lcs.mit.edu/mailman/listinfo/click
> > >
>
> --
> Nicholas C. Weaver                               nweaver at icsi.berkeley.edu
>      This message has been ROT-13 encrypted twice for higher security.
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