RFR: 8242240: JfrStacktrace_lock rank not special enough

[Erik Österlund]

Hi Per,

Thanks for the review.

/Erik

On 2020-06-09 09:27, Per Liden wrote:
> On 6/8/20 9:20 AM, Erik Österlund wrote:
>> Hi,
>>
>> After a ZGC event was added, we sometimes acquire the 
>> JfrStacktrace_lock (special rank) when the CodeCache_lock (special rank)
>> is held. This leads to an assertion error. My proposed solution is to 
>> make the JfrStacktrace_lock even more special (special - 1).
>> Special locks are the new normal.
>>
>> Bug:
>> https://bugs.openjdk.java.net/browse/JDK-8242240
>>
>> Webrev:
>> http://cr.openjdk.java.net/~eosterlund/8242240/webrev.00/
>
> Looks good!
>
> /Per
>
>>
>> Thanks,
>> /Erik