[8u] RFA for JDK-8152438: Threads may do significant work out of the non-shared overflow buffer

[Shafi Ahmad]

Hi,

Please approve this backport (patch doesn't apply cleanly) to 8u-dev.

Jdk9 bug: https://bugs.openjdk.java.net/browse/JDK-8152438
Webrev: http://cr.openjdk.java.net/~shshahma/8152438/webrev.00/
Jdk8 review link: http://mail.openjdk.java.net/pipermail/hotspot-dev/2016-August/024397.html
Jdk9 review thread: http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/2016-May/018147.html

Regards,
Shafi