On Fri, 2008-01-25 at 17:54 +1100, Benjamin Herrenschmidt wrote: > On Wed, 2008-01-23 at 13:42 +0100, Peter Zijlstra wrote: > > Another question, do you have: > > CONFIG_FAIR_GROUP_SCHED=y > > > > if so, does flipping that off have any effect? > > Yes. > > 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.
Hmm, interesting. As I said before, I thought I had tested with this disabled and not seen a difference, but I'll try again to confirm. -- Earthling Michel Dänzer | http://tungstengraphics.com Libre software enthusiast | Debian, X and DRI developer _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
