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SubjectRe: [PATCH] fully preemptible kernel
In linux-kernel, Heinz Diehl <> 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
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