> On Dec 5, 2020, at 7:59 PM, Nicholas Piggin <npiggin@xxxxxxxxx> wrote: > > I'm still going to persue shoot-lazies for the merge window. As you > see it's about a dozen lines and a if (IS_ENABLED(... in core code. > Your change is common code, but a significant complexity (which > affects all archs) so needs a lot more review and testing at this > point. I don't think it's ready for this merge window. I read the early patches again, and I think they make the membarrier code worse, not better. I'm not fundamentally opposed to the shoot-lazies concept, but it needs more thought and it needs a cleaner foundation.