RFR: 8233281: Obsolete UseSemaphoreGCThreadsSynchronization
Stefan Karlsson
stefan.karlsson at oracle.com
Fri Aug 14 14:12:30 UTC 2020
Thanks, Thomas.
StefanK
On 2020-08-14 15:49, Thomas Schatzl wrote:
> Hi,
>
> On 14.08.20 15:42, Stefan Karlsson wrote:
>> Hi all,
>>
>> Please review this patch to obsolete the diagnostic
>> UseSemaphoreGCThreadsSynchronization JVM option.
>>
>> https://bugs.openjdk.java.net/browse/JDK-8233281
>> https://cr.openjdk.java.net/~stefank/8233281/webrev.01
>>
>> I added this flag when implementing:
>> 8087324: Use semaphores when starting and stopping GC task threads
>>
>> It was intended to be a fallback solution if the new semaphore
>> implementation failed to to work for any reason. We've used the
>> semaphore code for many years now, and the Mutex implementation has
>> bit rottened.
>>
>> The proposed patch both obsoletes the the JVM flag, and removes the
>> Mutex dispatch mechanism.
>
> lgtm.
>
> Thomas
>
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