Re: linux-2.4.26-om1 kernel running under Ubuntu 6.06.1 LTS

Anonymous wrote:
> This is great news! Will there be a howto? Right now I'm wondering, if the best
> way to run Openmosix at the moment on my existing system would be with this
> kernel in Ubuntu or the 2.4.27 from Clusterknoppix.

Hello, Anonymous :-)

Yes, there will - I'll put the details on the openMosix wiki when I've 
got time but for now, briefly:

  1. You need to know how to recompile the openMosix kernel
  2. Patch the kernel sources as I described previously
  3. Patch hpc/mig.c using the patch below
  4. Compile and install the linux-2.4.26-om1 kernel
  5. Reboot single-user
  6. "cd /dev; ./MAKEDEV generic" # udev not supported by 2.4 kernel
  7. "discover -f "%m\t%M\n" all" # to find kernel modules to load
  8. modprobe to check the modules are in the kernel...
  9  if not, reconfigure the kernel and start again at step 4
10. vi /etc/modules.conf #add aliases e.g. alias eth0 sk98lin
11. reboot multi-user
12. Configure openMosix

> diff -Naur linux-2.4.26-om1.old/hpc/mig.c linux-2.4.26-om1/hpc/mig.c
> --- linux-2.4.26-om1.old/hpc/mig.c      2004-11-19 20:23:51.000000000 +0000
> +++ linux-2.4.26-om1/hpc/mig.c  2007-01-07 01:44:56.000000000 +0000
> @@ -854,8 +854,8 @@
>         /* else do not bother - DEPUTY will bring */
>         /* send task segment registers.
>          */
> -       asm volatile ("movl %%fs,%0":"=m" (*(int *) &m.fs));
> -       asm volatile ("movl %%gs,%0":"=m" (*(int *) &m.gs));
> +       asm volatile ("mov %%fs,%0":"=m" (m.fs));
> +       asm volatile ("mov %%gs,%0":"=m" (m.gs));
>         /* send task  limits */
>         m.rlim_cpu = p->rlim[RLIMIT_CPU];
>         m.rlim_data = p->rlim[RLIMIT_DATA];

Let me know how you get on. Our linux-2.4.26-om1 Ubuntu-based Beowulf 
cluster has been up for three days now without any problems so far.

Best wishes,

	Tony.
-- 
Dr. A.J.Travis,                     |  mailto:[email protected]
Rowett Research Institute,          |    http://www.rri.sari.ac.uk/~ajt
Greenburn Road, Bucksburn,          |   phone:+44 (0)1224 712751
Aberdeen AB21 9SB, Scotland, UK.    |     fax:+44 (0)1224 716687

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