On Sun, 11 Jan 2026 17:11:32 GMT, Igor Rudenko <[email protected]> wrote:
> Use the largest known value for default allocation alignment so that align > value that less than 16 (typical align for modern systems) turns to 16 This PR seems in conflict with the goals of another PR: https://git.openjdk.org/jdk/pull/28235 In that PR (see lengthy discussion) it emerged that in modern C standards, malloc is only constrained to return an alignment that is compatible with the size of the object being allocated. So, when allocating 2 bytes, some malloc implementations are allowed to return a 2-byte aligned address -- that's not against the spec. So, by forcing 16-byte min alignment on everything, we'd end up adding significant additional padding when e.g. preloading the `jemalloc` allocator. It would be helpful if you could provide some examples of why the current behavior would not be correct on some platforms. ------------- PR Comment: https://git.openjdk.org/jdk/pull/29156#issuecomment-3738451086
