Request for clarification about changes in Hotspot across 8, 9, and 10

[Seán Coffey]

Hi David,

we're aware of this issue and are taking steps to address it. See

http://mail.openjdk.java.net/pipermail/jdk8u-dev/2017-March/006512.html

regards,
Sean.


On 24/03/2017 01:36, David Holmes wrote:
> Hi Gustavo,
>
> This is really a question for jdk8u-dev - cc'd.
>
> On 24/03/2017 8:24 AM, Gustavo Romero wrote:
>> Hi,
>>
>> I understand the current status of OpenJDK 8, 9, and 10 regarding 
>> changes in
>> Hotspot as:
>>
>> jdk8u: "We're open for fixes for 8u152 in the jdk8u-dev 
>> forest"                        [1]
>> jdk9 : We passed Rampdown Phase 2 (2017/03/16) so "only showstopper 
>> bugs can be fixed" [2]
>> jdk10: "As of today these forests are open for bug fixes and small 
>> enhancements"       [3]
>>
>> Distros in general will repackage (update) OpenJDK following the CPU 
>> cycles [4].
>> The next CPU release is on 18 April. If a change is already in jdk8u 
>> when
>> repackaging due to the CPU release occurs, then distros can - under 
>> request -
>> take the change into the new updated OpenJDK 8 package.
>>
>> But to get a change into jdk8u I need to get it first into 10, then 
>> request
>> backport to 9, and finally request a backport to 8u. However, jdk9 
>> passed the
>> Rampdown Phase 2, so the change can't get into 9 and hence can't get 
>> into jdk8u
>> by now. So it looks like jdk9 current status is blocking the path to 
>> jdk8u.
>
> I raised this recently in relation to a RFE that was being backported 
> to 8u and thus could not now go into 9:
>
> http://mail.openjdk.java.net/pipermail/jdk8u-dev/2017-March/006486.html
>
> The "conclusion" was that this would be re-examined as the need arose. 
> So if you have need ...
>
>> If the change (bug fix or enhancement) is PPC64-only (let's say a 
>> change in the
>> ppc.ad file), is it possible to get it into 8u before 18 April (next 
>> CPU release)
>> somehow? If not, what are the options? Is it necessary to wait 9 GA 
>> and so jdk9u?
>
> I don't know how you handle producing eg PPC64 builds to match a given 
> CPU release. I would have presumed you would simply wait till the CPU 
> changes are pushed to jdk8u-dev and then produce a build containing 
> all CPU fixes along with any other fixes already accumulating in 8u-dev ?
>
> David
> -----
>
>> Thank you very much.
>>
>> Best regards,
>> Gustavo
>>
>> [1] http://openjdk.java.net/projects/jdk8u/
>> [2] http://openjdk.java.net/projects/jdk9/
>> [3] 
>> http://mail.openjdk.java.net/pipermail/jdk10-dev/2017-January/000041.html
>> [4] 
>> http://www.oracle.com/technetwork/es/topics/security/alerts-086861.html
>>