On Fri, 19 Feb 2021 18:15:45 GMT, Yumin Qi <mi...@openjdk.org> wrote:
> Hi, Please review > Usually most OSes are configured with page size of 4K, but some others are > configured with 64K. If jdk binary is built on 4K platform and run on > different configured platforms, CDS fails to be loaded due to region > alignment mismatch: > Unable to map CDS archive -- os::vm_allocation_granularity() expected: 4096 > actual: 65536 > This change uses 64K as region alignment if OS page size is less than 64K. > For most of the current OSes, means always use 64K as file map region > alignment. > The archive size will increase about 300K due to the change. > Tests: tier1-4 > Run MacOS/X64 binary on MacOS/aarch64 > > Thanks > Yumin This pull request has now been integrated. Changeset: 3820ab9e Author: Yumin Qi <mi...@openjdk.org> URL: https://git.openjdk.java.net/jdk/commit/3820ab9e Stats: 222 lines in 16 files changed: 163 ins; 16 del; 43 mod 8236847: CDS archive with 4K alignment unusable on machines with 64k pages Reviewed-by: iklam, stuefe, erikj, ihse ------------- PR: https://git.openjdk.java.net/jdk/pull/2651
