On Friday 19 March 2010 06:23:33 pm Prarit Bhargava wrote: > > Blocking does not work. > > But I have an idea, whatabout: > > - CPU add rule which only adds a CPU if the corresponding Numa node > > already has onlined memory > > - Memory add rule which adds the memory and also onlines CPUs if the > > Numa node still has offlined CPUs > > > > This has the side effect that you online a CPU which may have been > > offlined on purpose if you hotadd memory on the same node..., a rather > > uncommon case. > > That actually might be more of a problem than you think. It's not > atypical that in the evening a system's components are offlined in order > to save power. This shouldn't be a problem currently, because offlined CPUs drain more power than online ones: http://bugzilla.kernel.org/show_bug.cgi?id=5471 > Maintenance also is scheduled for downtime I don't understand this part. > so when > memory is added to the system we may bring cpus into service > erroneously. I think the "end-user" may not be too happy with this result. ... > > I wanted to post something today, but I couldn't made it. > > Still I more or less could prove that above works and I hopefully can > > show some results on Monday. > > If it works then I'm all for it :) Great. I'll hopefully post some patches in a new thread soon and try to collect all interested people in CC. Thomas -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
