Hi Andrew,
cc'ing hotspot-dev
On 20/12/2012 3:11 AM, Andrew Hughes wrote:
Hi,
What is the process for getting into HotSpot changes into 7u?
Can individual changesets be suggested and committed or do we have
to wait for a bulk update? And who decides what goes in these bulk
updates?
Disclaimer: This is my observation not a reflection of any written
policies etc.
Most (all?) Hotspot changes come in via the hsX forest (currently hs24
for 7u12). Most backports come about from things "we" know we need in 7;
some come from individual engineers sponsoring the jdk8 change and then
the backport (I've done a few of those).
Individual changesets can be suggested, but only hsx committers can
commit them, so you likely need a sponsor (as was likely needed for the
8/hs25 changeset anyway). The decision process is similar for 7u in
general - we need to look at the nature of the problem and the fix and
whether it is suitable for an update release (ie we won't backport
perm-gen removal just because someone asks :) ). Backport complexity can
also be an issue because of the significant changes between 7u and
present 8 hotspot sources.
We'd like to see the following changesets in 7u:
7170638: Use DTRACE_PROBE[N] in JNI Set and SetStatic Field.
http://hg.openjdk.java.net/jdk8/jdk8/hotspot/rev/75982791ddb6
This seems reasonable to me. Though I will note that a few developers on
the JDK disliked the appearance of the ""**NOTICE** Dtrace support
disabled: ..." message in their build output.
8000622: Forgot to hg add and check in test for JDK-7170638
http://hg.openjdk.java.net/jdk8/jdk8/hotspot/rev/26351ce8c4b0
Again seems reasonable to me.
8000780: make Zero build and run with JDK8
http://hg.openjdk.java.net/jdk8/jdk8/hotspot/rev/a3e2f723f2a5
And again.
I'd suggest approaching the original engineers who sponsored these
fixes. But please bear in mind that we are hitting an extremely busy
period with JDK 8.
David
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Thanks,
