RFR: 8277854: The upper bound of GCCardSizeInBytes should be limited to 512 for 32-bit platforms

[Hamlin Li]

On Fri, 26 Nov 2021 08:33:27 GMT, Jie Fu <jiefu at openjdk.org> wrote:

> > * Not sure if the lower bound should also be distinguished between 32 and 64. It's not because of crash, but as you're touching it, should we consider this?
> 
> Not sure if there is any benefit to distinguish the lower bounds between 32-bit and 64-bit platforms. But this pr aims at fixing the crash caused by the incorrect upper bound on 32-bit platforms. So a separate pr seems better if the lower bound needs to be re-considered.

I'm fine with it.

> 
> > * Does a CSR needed?
> 
> Maybe not since no VM flags are added or removed and jdk18 hasn't been released yet. But I'm not sure.

Please follow Thomas's suggestion.

> 
> > * A regression test would be helpful.
> 
> There is already a jtreg test runtime/CommandLine/OptionsValidation/TestOptionsWithRanges.java for this regression.
> 

I was wondering why it's not caught by regionion test until I saw Thomas' response.

Thanks for clarifying and fixing this.

-------------

PR: https://git.openjdk.java.net/jdk/pull/6569