From: Benjamin Herrenschmidt <b...@kernel.crashing.org> Date: Tue, 24 Mar 2015 09:21:05 +1100
> Dave, what's your feeling there ? Does anybody around still have > some HW that we can test with ? I don't see what the actual problem is. Even if you use multiple pools, which we should for scalability on sun4u too, just do the flush when allocation in _any_ pool wraps around. That's still better than not doing the optimization at all. That is always going to be correct, and you can use a separate spinlock to make sure only one thread of control does the full IOMMU flush at a time. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
