[8u] Request for approval - 8145539: (coll) AbstractMap.keySet and .values should not be volatile

[Rob McKenna]

Approved. Please add the appropriate noreg label to the bug.

I can push this for you over the next day or two.

	-Rob

On 22/12/15 18:38, Aleksey Shipilev wrote:
> Hi,
>
> Please approve and sponsor this simple backport for an old (yet
> important) performance issue in collections:
>    https://bugs.openjdk.java.net/browse/JDK-8145539
>
> The fix was in jdk9/dev for at least 4 days now.
>
> JDK 9 Changeset:
>    http://hg.openjdk.java.net/jdk9/dev/jdk/rev/ce72c7641f38
>
> JDK 9 review thread:
>
> http://mail.openjdk.java.net/pipermail/core-libs-dev/2015-December/037674.html
>
> Patch applies with little fuzz after unshuffling. For the record, this
> is the clean patch against current 8u:
>    http://cr.openjdk.java.net/~shade/8145539/8145539-8u.patch
>
> Testing: builds and runs fine on Linux x86_64, microbenchmark
> improvements are the same as in JDK 9.
>
> Thanks,
> -Aleksey
>