ppc32: Weird process scheduling behaviour with 2.6.24-rc

[Benjamin Herrenschmidt]

On Fri, 2008-01-25 at 17:54 +1100, Benjamin Herrenschmidt wrote:
> 
> Here, I do the test of running 4 times the repro-case provided by Michel
> with nice 19 and a dd eating CPU with nice 0.
> 
> Without this option, I get the dd at 100% and the nice 19 shells down
> below it with whatever is left of the CPUs.
> 
> With this option, dd gets about 50% of one CPU and the niced processes
> still get most of the time.

FYI. This is a 4 way G5 (ppc64)

Ben.