[aarch64-port-dev ] Freeze aarch64/jdk8

[Andrew Hughes]

----- Original Message -----
> On 02/25/2016 02:20 PM, Andrew Dinn wrote:
> > On 25/02/16 13:38, Andrew Haley wrote:
> >  . . .
> > 
> >>> volcas.patch
> >>> revid: 8568
> >>> Backport optimization of volatile puts/gets and CAS to use ldar/stlr
> >>
> >> It's probably safe, but there have been significant reworkings in
> >> this area.
> >>
> >> Maybe make this AARCH64_ONLY ?  Please have a look at the generated
> >> code when running G1.
> > 
> > This shared change reverts part of a modification you had previously
> > made to the shared code in an earlier attempt to implement optimization
> > of volatile puts on AArch64. So, applying this patch merely restores the
> > status quo as regards the shared code that is currently in both jdk8 and
> > upstream jdk8u.
> >
> > Also, the same reversion was applied and is still present in jdk9. It
> > has no bearing on any of the reworkings that have happened since the
> > original patch was added to jdk9 and I don't envisage it having any such
> > effect.
> > 
> > So. I don't think there is any reason to make this AARCH64_ONLY.
> 
> OK.  I'm a bit mystified by the history of this one, but as long
> as in the end we don't diverge from upstream jdk8u I'm happy.
> 
> >>> 8138966.patch
> >>> revid: 8573
> >>> 8138966: Intermittent SEGV running ParallelGC
> >>
> >> Yes, serious crasher bug.  This is already in jdk8u.
> >> http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/rev/110735ab93ec
> >>
> >> Please Ask Andrew Hughes about this one: it should already be in.
> > 
> > We already agreed that I would include this as part of my patch.
> 
> OK.
> 

I believe that was 8147805, not 8138966.

According to https://bugs.openjdk.java.net/browse/JDK-8138966,
this fix is in 8u76, so we'll pick it up when we merge 8u76 in April.
I don't see any problem with including it earlier though, if it's
a serious issue. Mercurial is intelligent enough to see that we've
already applied the change.

> Andrew.
> 
> 

-- 
Andrew :)

Senior Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)

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