Question of backport AppCDS to openjdk8u

[yumin qi]

Hi, Volker
On Wed, Oct 17, 2018 at 2:51 AM Volker Simonis <volker.simonis at gmail.com>
wrote:

> On Wed, Oct 17, 2018 at 10:53 AM yumin qi <yumin.qi at gmail.com> wrote:
> >
> > Hi, Gurus
> >
> >     I have a question about backporting AppCDS to jdk8u. Recently I have
> > been working on backporting AppCDS from jdk10 to jdk8(for internal use),
> I
>
> Did you succeed?
>
> There are a lot of differences between the Hotspot in OpenJDK 8 and 10
> and there also have been some more improvements for AppCDS in OpenJDK
> 11 so if you donwport it you'll probably want to downport the version
> from OpenJDK 11.
>
> Yes, the changes are large. I port it from jdk10 not jdk11.
So far, passed some tests on runtime/appcds (not all, some tests are not
for jdk8).


> That said, I think it will be a huge change and I'm not sure the
> current (and future) OpenJDK 8u maintainers will want to support it.
> But that's something they'll have to decide :)
>
> The maintenance after LTS for open part is Redhat? Yes, that is a problem
since no one what to have a big change after LTS.

> I think it would be a good idea to share the patch/webrev of your
> internal backport to give an idea of the required changes.
>
If it did not get in, I will post the webrev then.

Thanks
Yumin

>
> Regards,
> Volker
>
> > also want this feature in openjdk8. Since OracleJDK8 has AppCDS as
> > commercial feature, so need to know if it is okay to add this important
> > feature to open jdk8u before it is on LTS. If it is OK I will file a bug
> > and get it pushed into open repo.
> >
> >   Thanks
> >   Yumin
>