This still doesn't solve the overflow problem. It's also too limiting: with u8 you can't ask for page-aligned data, and with u16 not for hugepage-aligned data.

This still doesn't solve the overflow problem. It's also too limiting: with u8 you can't ask for page-aligned data, and with u16 not for hugepage-aligned data. Granted, those aren't exactly prime use cases for a bump allocator, but it seems like poor design to limit the API unnecessarily.