ppc32: Weird process scheduling behaviour with 2.6.24-rc

Benjamin Herrenschmidt benh at kernel.crashing.org
Fri Jan 25 17:54:42 EST 2008

On Wed, 2008-01-23 at 13:42 +0100, Peter Zijlstra wrote:
> Another question, do you have:
> if so, does flipping that off have any effect?


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.


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