RFR(XS): 8245850: Obsolete UseLWPSynchronization

[Mikael Vidstedt]

Thanks for the review! Change pushed.

Cheers,
Mikael

> On May 27, 2020, at 2:28 PM, Daniel D. Daugherty <daniel.daugherty at oracle.com> wrote:
> 
> On 5/27/20 5:23 PM, Mikael Vidstedt wrote:
>> Please review this small change which obsoletes the UseLWPSynchronization flag:
>> 
>> JBS: https://bugs.openjdk.java.net/browse/JDK-8245850
>> webrev: http://cr.openjdk.java.net/~mikael/webrevs/8245850/webrev.00/open/webrev/
> 
> src/hotspot/share/runtime/arguments.cpp
>     No comments.
> 
> src/hotspot/share/runtime/globals.hpp
>     No comments.
> 
> Thumbs up! I think this is a trivial fix and doesn't need to wait for 24 hours
> before being pushed.
> 
> Dan
> 
> 
> 
>> CSR: https://bugs.openjdk.java.net/browse/JDK-8245851
>> 
>> Background (from JBS):
>> 
>> With Solaris removed (JDK-8241787) the UseLWPSynchronization flag no longer has any effect and should be removed using the normal process. Since the flag was really only useful on Solaris and since all the code it once controlled is now gone the flag will go directly to obsolete, skipping the deprecation step.
>> 
>> Testing:
>> 
>> * Manual verification running with the flag: spits out the warning as expected
>> * tier1: passes
>> 
>> Cheers,
>> Mikael
>> 
>