RFR: 8303210: [linux, Windows] Make UseSystemMemoryBarrier available as product flag [v5]

[Martin Doerr]

On Wed, 29 Mar 2023 00:01:33 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Martin Doerr has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Move flag configuration and initialization to os::init_2.
>
> src/hotspot/os/aix/os_aix.cpp line 2348:
> 
>> 2346:     }
>> 2347:     FLAG_SET_ERGO(UseSystemMemoryBarrier, false);
>> 2348:   }
> 
> This looks like a leftover ?? It shouldn't be here.

Thanks! The one is os::init was the leftover. The flags are initialized in `init_2`.

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PR Review Comment: https://git.openjdk.org/jdk/pull/12753#discussion_r1151727624