I agree that it is wise to intersect cq_cpumask with online_cpumask in cq_cpulist_set(), and if cpuset_weight(cq_cpumask & online_cpumask) == 0 -- ignore cq_cpumask and stick with default behavior.
I don't think cpu offlining is problematic here. If CPU is offlined -- the IRQ (and queue) will be served by another online CPU. Yes, it will break IRQ affinity and make cq_cpumask setting pointless, but this is system administrator's problem. The parameter is only useful for fine tuning and some resource planning in advance is required. I don't think that this side effect is enough to motivate "unsafe" tag. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1831566 Title: [realtime app] not possible to redirect drivers/nvme IRQs from realtime cpuset To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1831566/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
