On Wed, 2016-02-03 at 12:06 -0500, Tejun Heo wrote: > On Wed, Feb 03, 2016 at 06:01:53PM +0100, Mike Galbraith wrote: > > Hm, so it's ok to queue work to an offline CPU? What happens if it > > doesn't come back for an eternity or two? > > Right now, it just loses affinity. A more interesting case is a cpu > going offline whlie work items bound to the cpu are still running and > the root problem is that we've never distinguished between affinity > for correctness and optimization and thus can't flush or warn on the > stagglers. The plan is to ensure that all correctness users specify > the CPU explicitly. Once we're there, we can warn on illegal usages. Ah, and the rest (the vast majority) can then be safely deflected away from nohz_full cpus. -Mike -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html