On Thu, 9 May 2024 05:04:47 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
>
> Does anyone else have an opinion on this matter? The question is:
> 
> "Should we enable cds-compatible alignment in the configure options by 
> default generally, not only for Linux aarch64" ?
> 
> This would, in addition to the proposed change affecting Linux on aarch64, 
> also affect MacOS x64. JVMs built there would be able to run, by default, in 
> Rosetta. At the price of sligthly increased archive size of a dozen KB or so.
> 
> If nobody objects, I will do that since I like the simplicity of it.

@tstuefe We already have an issue to reset the default to true (raised by 
@iklam)

https://bugs.openjdk.org/browse/JDK-8331952

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PR Comment: https://git.openjdk.org/jdk/pull/19142#issuecomment-2102202184

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