Request for Review(xs) - 8155263: DisableStartThread should not be applied to GC worker threads
jon.masamitsu at oracle.com
Tue Jul 19 17:47:48 UTC 2016
Thanks, Thomas, for the Review.
I still need one more review, please.
On 7/12/2016 11:49 AM, Jon Masamitsu wrote:
> Yes, Thomas, you guessed correctly. And so others don't have to guess.
> On 7/12/2016 10:37 AM, Jon Masamitsu wrote:
>> The flag DisableStartThread is defined for Java threads
>> develop(bool, DisableStartThread, false, \
>> "Disable starting of additional Java threads " \
>> "(for debugging only)")
>> but was being applied to GC threads in one case. I removed
>> that use.
>> Tested by comparing the GC threads before and after the
>> change to verify that the concurrent GC threads were running.
>> Using +DisableStartThread on the command line cause the Java
>> threads not to run and under those circumstances a safepoint
>> is not reached (Java threads never get there). Any of the test
>> programs I tried hung at the first GC.
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