On Tue, May 05, 2015 at 12:31:12PM -0400, Tejun Heo wrote: > > What I don't want to happen is controllers failing migrations > willy-nilly for random reasons leaving users baffled, which we've > actually been doing unfortunately. Maybe we need to deal with this > fixed resource arbitration as a separate class and allow them to fail > migration w/ -EBUSY. Ah, _that_ was the problem. Which is something created by this co-mounting of controllers. You could of course store the ss-id of the failing operation in task_struct and have a file reporting the name of the ss-id. That way, there is a simple way to find out which controller failed the migrate. -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html