hang when using -XX:-UseCompilerSafepoints

[David Holmes]

On 13/11/2014 6:55 PM, Aleksey Shipilev wrote:
> On 13.11.2014 11:47, David Holmes wrote:
>> On 13/11/2014 5:43 PM, Aleksey Shipilev wrote:
>>> On 13.11.2014 08:40, David Holmes wrote:
>>>> There is some history in JDK-4974572 (which is non-public I'm afraid).
>>>> To all intents and purposes the flag at that point was used to enable
>>>> testing of workarounds if problems were suspected in the "new"
>>>> safepointing code. I think it has outlived its usefulness by a few major
>>>> releases so I'm happy to see it go.
>>>
>>> Filed:
>>>     https://bugs.openjdk.java.net/browse/JDK-8064777
>>
>> You actually filed 8064776 first :)
>
> O_o. The submit timestamps are the same. JIRA is funky today, huh.
>
>> But neither is needed as removal can be the solution of 8064749.
>
> I thought we are better off tracking this separately, and then close
> all/any pending bugs about UseCompilerSafepoints as WNF citing 8064776.
> Still want to do this in 8064749?

It is what I did in 8062307 for the TraceThreadEvents flag. 8064749 
contains all the pertinent comments.

> Also, I wonder if we want to demote the flag to experimental in 8u. This
> does not sound like a backport of 8064749 at all, but rather a separate
> change.

Any change requires CCC. I don't see any point in making the flag 
experimental as it doesn't really provide any "experimentation".

Happy to let others weigh in.

Cheers,
David



> -Aleksey.
>