On Tue, Dec 08, 2020 at 01:57:09PM +0100, Sebastian Andrzej Siewior wrote: > Yes, you are right. Even cross-CPU completion for single-queue was > already completing in softirq. So the only change is for multiqueue > devices which you just demonstrated that it does not happen. It can happen if there are less hardware queues than CPUs. But I'd bet that application which care about performance are well aware of this and try to keep the work vertical aligned.
