On Thu, 2012-09-13 at 10:45 +0200, Peter Zijlstra wrote: > On Thu, 2012-09-13 at 10:37 +0200, Vincent Guittot wrote: > > > I think you need to present numbers showing benefit. Crawling all over > > > a mostly idle (4096p?) box is decidedly bad thing to do. > > Yeah, but we're already doing that anyway.. we know nohz idle balance > doesn't scale. Venki and Suresh were working on that, but with Venki > switching jobs this work got dropped. > > I did talk to Suresh about it a week or so ago.. I think he was going to > look at it again.
As a reminder to Suresh.. please also consider calc_load_{idle,idx} in this work, its another nohz 'feature' that doesn't scale for pretty much the same reason. That is, I'm fine with the initial patches not actually fixing that, but the structure put in place for the ILB should allow for it. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/