8162795: was: Re: [8u-dev] Request for approval: backport 8152271: MemberNameTable doesn't purge stale entries

[Kevin Walls]

Thanks Rob!


On 24/02/2017 14:02, Rob McKenna wrote:
> Approved. Please add an appropriate noreg label to the main bug.
>
>      -Rob
>
> On 24/02/17 11:06, Kevin Walls wrote:
>> Hi again,
>>
>> I'm back: 8152271 has been re-applied to 9.  While it did cause a
>> microbenchmark regression, certain apps have a more serious regression
>> between jdk7 and 8, which is remedied by 8152271.  The bug for the
>> re-application is:
>>
>> 8162795: [REDO] MemberNameTable doesn't purge stale entries
>> https://bugs.openjdk.java.net/browse/JDK-8162795
>>
>>
>> So this is a request for approval to backport 8162795 into jdk8u-dev.  The 9
>> changeset imports directly except for one copyright year difference.
>>
>> approval mails in 9: http://mail.openjdk.java.net/pipermail/hotspot-runtime-dev/2017-February/022620.html
>> 9 changeset: http://hg.openjdk.java.net/jdk9/dev/hotspot/rev/b1606e8fee8c
>> (which is Coleen's original change from JDK-8152271 with one copyright year
>> change)
>>
>> Many thanks
>> Kevin
>>
>>
>> On 27/01/2017 12:48, Kevin Walls wrote:
>>> Oh, thanks David.  There was me getting excited it solved all my
>>> problems...
>>>
>>> Thanks
>>> Kevin
>>>
>>>
>>> On 27/01/2017 11:04, David Holmes wrote:
>>>> Hi Kevin,
>>>>
>>>> On 27/01/2017 8:25 PM, Kevin Walls wrote:
>>>>> Hi,
>>>>>
>>>>> I'd like to backport the following to 8u-dev.
>>>>>
>>>>> 8152271: MemberNameTable doesn't purge stale entries
>>>>>
>>>>> https://bugs.openjdk.java.net/browse/JDK-8152271
>>>> That change was backed out again:
>>>>
>>>> https://bugs.openjdk.java.net/browse/JDK-8161445
>>>>
>>>> David
>>>> -----
>>>>
>>>>> An hg import from the 9 changeset:
>>>>>
>>>>> http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/13b2c7ac95a5
>>>>>
>>>>> ...works and tests well in jprt and with a manual testcase that showed
>>>>> a
>>>>> gc slowdown before the fix.
>>>>>
>>>>>
>>>>> Thanks
>>>>> Kevin
>>>>>
>>>>>