Re: Kernel woes...!

["Ed Okerson" <eokerson-at-fw.telenic.net>]

----- Original Message -----
From: <dlantz-at-armorholdings.com>
To: "Multiple recipients of list" <emc-at-nist.gov>
Sent: Thursday, January 03, 2002 2:38 PM
Subject: RE: Kernel woes...!


>
> recompiling a kernel can be quite complicated.  i've done it successfully a
> few times, and unsuccessfully about 10 times.  if i remember correctly, the
> boot image is dumped into '/' and it needs to be in /boot, then you will
> need to manually edit /etc/lilo.conf to point to that boot image.. and also
> some kind of map... it's been quite a while right now.  i had found a
kernel

This is an easy one to fix.  In /usr/src/linux edit the Makefile with your
favorite editor, search for the line

#export      INSTALL_PATH=/boot

and delete the # at the beginning of the line that makes it a comment so you
have:

export      INSTALL_PATH=/boot

save the file, now when you build the kernel with "make bzlilo" it will save
the image in /boot AND run lilo for you so you only need reboot to the new
kernel.

> howto that walks you through MOST of the steps
> just remember to keep a boot floppy handy, and when you edit lilo.conf, ADD
> the new kernel, DONT delete the old one, so that if it chokes, you will
> still be able choose the working kernel at boot.

This is always good advice.

> i rename the old kernel linux.old and name the new one linux.. i think
> the machine i experimented on at home (in storage now... sigh....) was
> booting four different kernels, 2.2.12, 2.2.12 SMP, 2.4.1, and 2.4.1-SMP
> i never ironed out the bugs in them so different things worked in different
> kernels (no sound in 2.2.12, qcad wouldnt' work in 2.4.1, etc...)
> have you concidered dual booting it with the BDI to see if you can get it
to
> work?
> ---Dave
>
> > PKF wrote:
> >
> > > This is kind of long, so please bear with me!
> > >
> > > Here's where I am.  After finally hunting down a replacement cdrom
> > > drive, I've finally got the BDI running on a 120 MHz/16Mb system.  I
> > > have found that the steppers run quite slowly, and the X
> > interface is
> > > pretty clunky with the video hardware I have, so I'm thinking about
> > > installing emc/rtlinux on a 333Mhz/128Mb machine I have
> > that's already
> > > running RedHat 6.2.
> > >
> > > On the RH6.2 machine I'm currently running Linux kernel
> > 2.2.12-20, which
> > > is not one of the versions that Ray's instructions mention.  Not too
> > > surprisingly, compiling RTL-2.2 anyway and trying to
> > install it did not
> > > get me a working real-time kernel.  It did get me as far as
> > generating a
> > > bzImage, but even though lilo claims to have added it as rtl22 it I
> > > cannot see or select it at boot time.  The real problem is
> > that I have
> > > only a very vague idea of what I'm doing when it comes to
> > kernels!!   It
> > > still boots with the old kernel, fortunately, so I'm still up and
> > > running.
> > >
> > > I know what you're thinking: the BDI was invented for you, ya
> > > bonehead!   That's great, and I'd install BDI on the faster
> > machine in a
> > > second, except that I'd really like to keep using my
> > ethernet card.  The
> > > BDI disk that I have contains a kernel that I don't think has any
> > > support for my card (not to mention my SCSI disk).
> > >
> > > So the dilemma is:  do I flail away at compiling a kernel
> > that will run
> > > on the faster computer, or do I give up and just go with
> > the BDI minus
> > > the network?  Neither appeals to me very much.  At the moment I'm
> > > holding out little hope that I can survive another few
> > hours of kernel
> > > mayhem.  On the other hand, if somebody is running the same
> > > RH6.2/2.2.12-20 that I am and can shed some light, maybe.
> > >
> > > Well, thanks for listening.
> > >
> > > Regards,
> > > Patrick
> > >
> > > ps - Ray, I do have that X shutdown problem with my disk.
> > Maybe I'll
> > > wait and try it again with the newer version?
> >
>