Re: [PATCH] fully preemptible kernel

In linux-kernel, Heinz Diehl <[e-mail]> wrote:
>  On Wed Dec 26 2001, Steve Bergman wrote:
>  
>  [Preempt-kernel patch for 2.4.17 final]
> > I just compiled 2.4.17 with the patch from your site that looks to be
> > for 2.4.17-final.  Unfortunately, several modules (e.g. unix.o) fail on
> > load with an undefined symbol error (preempt_schedule).
>  
>  No problems here. Are you shure you built the kernel modules and they were
>  installed properly?

It might be because you didn't do a 'make mrproper' on a kernel tree
you've used before for a non-preempt build.  As I understand it the
preempt patch effectively makes your kernel SMP - this changes the
architecture of the kernel so you need a 'make mrproper'.

make mrproper deletes your .config file so save that first if you
wanted it ;-)

Also you need a seperate modules directory - the preempt modules
aren't compatible with non-preempt.  Edit the top level makefile and
put a suffix in.

BTW The preempt patch is working fine here too!
-- 
Nick Craig-Wood
[e-mail]