Problem booting with SMP Kernel

evil-monkey

Hi all,

I'm having trouble booting CentOS when I choose the SMP Kernel...

Attached is the error I'm seeing.

Thanks in advance.

Khannie

Is that in a VM perchance?

evil-monkey

It certainly is - why is that affecting it??

GreenHell

Hmmm, maybe the smp kernel is expecting to see two cpus?

Is regular bog standard kernel booting ok?

evil-monkey

GreenHell wrote: »

Hmmm, maybe the smp kernel is expecting to see two cpus?

Is regular bog standard kernel booting ok?

Yup, standard kernel boots fine.

The SMP should see the two CPUs...and ideas why it wouldn't??

GreenHell

Hold on a second actually

Can you copy your grub.conf here?

djmarkus

I would put my money on an initrd not having the correct kernel modules.

bringitdown

/Related:

should SMP kernel be used with HT / Dual Core processors?

evil-monkey

GreenHell wrote: »

Hold on a second actually

Can you copy your grub.conf here?

boot=/dev/sda
default=1
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.9-34.ELsmp)
root (hd0,0)
kernel /vmlinuz-2.6.9-34.ELsmp ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.9-34.ELsmp.img

title CentOS-4 i386 (2.6.9-34.EL)
root (hd0,0)
kernel /vmlinuz-2.6.9-34.EL ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.9-34.EL.img



there ya go chief...

GreenHell

Ah bugger, they look fine

Can you verify the correct vmlinuz and initrd exist in /boot

evil-monkey

GreenHell wrote: »

Ah bugger, they look fine

Can you verify the correct vmlinuz and initrd exist in /boot

Please excuse any c**k-ups I make while following ye're suggestions, but I'm not totally adept in the workings of Linux!!

anywhoo, these are how they exist in /boot...

initrd-2.6.9-34.ELsmp.img
vmlinuz-2.6.9-34.ELsmp

...looks good to me??

GreenHell

Ya your right, the error says it can't find your lvm. But all your setup looks fine. Even if you only have a single core cpu the kernel should still boot.

Last resort maybe would be to reinstall the kernel, but other than that I'm out of ideas to be honest.

Khannie

I think there's an issue using > 1 cpu in some versions of vmplayer. If you open up the .vmx file in notepad and specify one cpu instead of two, then try to boot the smp kernel and see what happens.

evil-monkey

Khannie wrote: »

I think there's an issue using > 1 cpu in some versions of vmplayer. If you open up the .vmx file in notepad and specify one cpu instead of two, then try to boot the smp kernel and see what happens.

Running in ESX 3.5. Will try suggestion with the .vmx file there now and post back...

evil-monkey

evil-monkey wrote: »

Running in ESX 3.5. Will try suggestion with the .vmx file there now and post back...

no joy. still the same error. awww this is a right pain in the toosh. just can't see what could be causing it...

evil-monkey

djmarkus wrote: »

I would put my money on an initrd not having the correct kernel modules.

How does one go about checking this??

Rambo

evil-monkey wrote: »

Hi all,

I'm having trouble booting CentOS when I choose the SMP Kernel...

Attached is the error I'm seeing.

Thanks in advance.

had the same error on Redhat today
I had no Buslogic SCSI driver install after a yum update

I booted back into the working kernel and recompiled the Buslogic driver
for the new SMP kernel
copy driver to /lib/modules/[kernel-version]/drivers/scsi

then I did
depmod -A # makes a list of dependencies
injet driver into initrd-[kernel-version]

mkintrd -f -v /boot/initrd-[kernel-version] [kernel-version]
then rebooted

and presto I had new version of kernel booting

[kernel-version] means the version of kernel 2.6.9.55.smp
or what ever you are using

hope this helps