On Tue, Sep 10, 2024 at 10:21:09AM -0600, Keith Busch wrote: > I was hoping to not introduce another queue limit for the metadata > virt_boundary_mask. We could remove the virt_boundary from the NVMe PCI > driver if it supports SGL's and then we're fine. But we're commiting to > that data format for all IO even if PRP might have been more efficient. > That might be alright, though. The real question is if we actually want that. If we want to take fully advantage of the new dma mapping API that Leon is proposing we'd need to impose a similar limit. And a lot of these super tiny SGL segments probably aren't very efficient to start with. Something that bounce buffers a page worth of PI tuples might end up beeing more efficient in the end.
