Re: Installing SMP kernel
Hi,
It looks like either will work, but I would start with the first with a
few additions.
If you look at the first file, you will see that the link to the kernel
file: "/boot/vmlinux" is specified rather than the kernel itself
"/boot/vmlinux-2.6.8-power4-smp". The reason for this is that when you
run updates, (using apt or synaptic or kpackage) the new kernel can be
linked to "/boot/vmlinux" without ever running ybin or yabootconf again.
Say when the 2.6.9 kernel comes out, apt will relink /boot/vmlinux
to /boot/vmlinux-2.6.9-power4-smp.
Now what seems to be missing are the following lines:
image=/boot/vmlinux.old
label=Linux.old
read-only
initrd=/boot/initrd.img.old
initrd-size=8192
Put these after the section for image=/boot/vmlinux, and you will be
able to select which kernel to boot at boot time. This is also very
good, as when you install a ndw kernel using apt (or a front end) it
will automatically link your previous kernel to vmlinux.old, so that you
can always go back if things go wrong.
I also recommend that you add the line:
default=Linux
somewhere BEFORE the line image=/boot/vmlinux
strickly speaking, this is not necessare if youu always have your
preferred boot option listed first, but (I think) it doesn't hurt to
force the default.
Now when you reboot you will see a querry as to which kernel to boot.
You probably currently ignore this and it goes away in 30 seconds,
followed by the normal boot up. Once you have the boot porcess working,
try typing <tab> at this point, it should give you the options Linux and
Linux.old. you can type in either to get the correct boot.
cheers
John
>
On Wed, 2005-02-23 at 16:09 +0000, Arnór Kristjánsson wrote:
> Hi,
>
> I just installed Debian on the xserve I've been battling with for the
> last few days, foregoing raid support and such. I used "install-power4"
> which installs the package kernel-image-2.6.8-power4. I want to enable
> smp in the kernel so I installed kernel-image-2.6.8-power4-smp, ran
> yabootconfig which didn't ask me what kernel I wanted to use (and I'm
> assuming it is not its job to do that) which nets me this in
> /etc/yaboot.conf:
>
> ## yaboot.conf generated by yabootconfig 1.0.8
> ##
> ## run: "man yaboot.conf" for details. Do not make changes until you
> have!!
> ## see also: /usr/share/doc/yaboot/examples for example configurations.
> ##
> ## For a dual-boot menu, add one or more of:
> ## bsd=/dev/hdaX, macos=/dev/hdaY, macosx=/dev/hdaZ
>
> boot=/dev/sda2
> device=/ht@0,f2000000/pci@7/k2-sata-root@c/k2-sata@0/disk@0:
> partition=3
> root=/dev/sda3
> timeout=30
> install=/usr/lib/yaboot/yaboot
> magicboot=/usr/lib/yaboot/ofboot
>
> image=/boot/vmlinux
> label=Linux
> read-only
> initrd=/boot/initrd.img
> initrd-size=8192
> --
>
> Am I correct in assuming that I can edit this file so it looks like
> this:
>
> ## yaboot.conf generated by yabootconfig 1.0.8
> ##
> ## run: "man yaboot.conf" for details. Do not make changes until you
> have!!
> ## see also: /usr/share/doc/yaboot/examples for example configurations.
> ##
> ## For a dual-boot menu, add one or more of:
> ## bsd=/dev/hdaX, macos=/dev/hdaY, macosx=/dev/hdaZ
>
> boot=/dev/sda2
> device=/ht@0,f2000000/pci@7/k2-sata-root@c/k2-sata@0/disk@0:
> partition=3
> root=/dev/sda3
> timeout=30
> install=/usr/lib/yaboot/yaboot
> magicboot=/usr/lib/yaboot/ofboot
>
> image=/boot/vmlinux-2.6.8-power4-smp
> label=Linux
> read-only
> initrd=/boot/initrd.img-2.6.8-power4-smp
> initrd-size=8192
> --
>
> And restart?
>
> The boot directory looks like this:
> box:/boot# ls -l
> -rw-r--r-- 1 root root 39522 2005-01-08 17:21 config-2.6.8-power4
> -rw-r--r-- 1 root root 39251 2005-01-08 17:21
> config-2.6.8-power4-smp
> -rw-r--r-- 1 root root 1024 2005-01-05 12:06 first.b
> lrwxr-xr-x 1 root root 27 2005-02-23 15:57 initrd.img ->
> initrd.img-2.6.8-power4-smp
> -rw-r--r-- 1 root root 4820992 2005-02-23 11:13
> initrd.img-2.6.8-power4
> -rw-r--r-- 1 root root 5046272 2005-02-23 15:57
> initrd.img-2.6.8-power4-smp
> lrwxr-xr-x 1 root root 23 2005-02-23 11:13 initrd.img.old ->
> initrd.img-2.6.8-power4
> -rw-r--r-- 1 root root 45328 2005-01-05 12:06 second.b
> -rw-r--r-- 1 root root 935380 2005-01-08 23:47
> System.map-2.6.8-power4
> -rw-r--r-- 1 root root 963240 2005-01-08 23:50
> System.map-2.6.8-power4-smp
> lrwxr-xr-x 1 root root 24 2005-02-23 15:57 vmlinux ->
> vmlinux-2.6.8-power4-smp
> -rw-r--r-- 1 root root 3941828 2005-01-08 23:47 vmlinux-2.6.8-power4
> -rw-r--r-- 1 root root 4227776 2005-01-08 23:50
> vmlinux-2.6.8-power4-smp
> lrwxr-xr-x 1 root root 20 2005-02-23 11:13 vmlinux.old ->
> vmlinux-2.6.8-power4
>
> The reason I ask is that after running the yabootconfig initrd.img is
> now a symlink to initrd.img-2.6.8-power4-smp; yabootconfig seems to
> have updated the files for me but last time I tried this (a couple of
> days ago) I was left with an unusable machine after reboot.
>
> Which way should I go with; yabootconfig or my custom editing? Are both
> wrong?
>
> A.
>
>
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