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The C API uses a `u64`, but I think > we can reasonably consider that we won't ever need chunks larger than > 4GB (or can we :O). I'm actually ok with using a `usize` for this one. > > One of the first things the C code does is throwing an error if it is > not a power of 2, so maybe we can even request an `Alignment`? > > I'm a bit torn as to whether we should use a `u64` to conform with the C > API, but doing so would mean we cannot use an `Alignment`... Alex, have you seen my Alignment patch [1], for that? It's sitting around with only Miguel having responded, but seems like exactly what you're talking about here. [1] https://lore.kernel.org/20260312031507.216709-3-jhubbard@nvidia.com thanks, -- John Hubbard