* Nick Piggin <nickpiggin@yahoo.com.au> wrote:

> Increasing priority (negative nice) doesn't have much impact. -20 CPU
> hog only gets about double the CPU of a 0 priority CPU hog and only
> about 120% the CPU time of a nice -10 hog.

this is a property of the base scheduler as well.

We can do a nonlinear timeslice distribution trivially - the attached
patch implements the following timeslice distribution ontop of
2.6.8-rc3-mm1:

   [ -20 ... 0 ... 19 ] => [800ms ... 100ms ... 5ms]

the nice-20/nice+19 ratio is now 1:160 - sufficient for all aspects.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>