On Wed, 8 May 2024 15:14:16 GMT, Thomas Stuefe <stu...@openjdk.org> wrote:
> On Linux aarch64, a JVM may encounter three different page sizes: 4K, 64K, > and (when run on Mac M1 hardware) 16K. > > Since forgetting to specify `--enable-compatible-cds-alignment` is a common > error that is only noticed when running the produced JVM on hardware with > different page size, we propose to enable that option by default on Linux > aarch64. The cost is a moderate increase in CDS archive size (about 300K). > > I tested this patch on: > - x64 Linux > - x64 Linux, crossbuilding to aarch64 > - building natively on aarch64 Linux This is obviously correct. Otherwise, the CDS archive will only work if the JDK happens to have been built on a machine with greater or equal page size. Does the default `compatible-cds-alignment=false` make any sense anywhere on other platforms, though? We might simply make compatibility the default. ------------- Marked as reviewed by aph (Reviewer). PR Review: https://git.openjdk.org/jdk/pull/19142#pullrequestreview-2046199994
